Reference / Paper · 2005
US Patent 6,869,285 B1 — Jones, Training Firearm (2005)
Filed 2003-06-11. A training pistol with CO2 gas recoil and a mechanically switched laser.
- training firearm
- co2
- gas recoil
- laser
Reference / Paper · 2005
Filed 2003-06-11. A training pistol with CO2 gas recoil and a mechanically switched laser.
US006869285B1 (12) United States Patent Jones, 11 (54) (10) Patent N0.: US 6,869,285 B1 (45) Date of Patent: Mar. 22, 2005 TRAINING FIREARM (76) Inventor: * ~ Charles R Jones, II, 3201 Belmont Cit Edmond OK (Us) 73034 ’ _ ’ ~ ( ) Notice. 5,363,834 A 11/1994 Stuchlik 5,622,160 A 4/1997 Casas Salva 5,664,552 A 5,711,286 A 9/1997 Kunimoto 1/1998 Petrosyan et al. 5,947,738 A ~ ~ - 6,146,141 * A 9/1999 11/2000 Muehle et al. .............. .. 434/16 Schumann SubJect to any disclaimer, the term of this 6,322,365 B1 110001 Shechter et a1‘ patent is extended or adJusted under 35 6 494 194 B2 12/2002 Shi achev et a1 U.S.C. 154(b) by 0 days. ’ ’ P ' * cited by examiner (21) Appl. N0.: 10/459,219 _ Primary Examiner—Kim Nguyen (22) Flled: Jun- 11’ 2003 (74) Attorney, Agent, or Firm—Mary M. Lee (51) Int. Cl.7 .............................................. .. G09B 19/00 (52) US. (58) Field of Search ............................. .. 434/11, 16, 18, Atraining ?rearm that Provides a realistic recoil effect The 434/17, 19, 20, 21, 22, 23, 24; 42/5, 1042, 395, 4203, 43, 7008 ?rearm, preferably a pistol, may be an actual ?rearm retro ?tted With a self-contained “blow back” assembly. Usually, Cl. . . . . . . . . . . . . . . . . . . . . . . . . .. 434/16; (57) ABSTRACT 42/10 the pistol Will include a laser device that emits a laser beam (56) References Cited readable by a target system. The laser replaces live rounds, Us PATENT DOCUMENTS 2,023,497 A 12/1935 Trammell and the bloW back assembly causes return of the slide to cycle in a manner similar to that caused by live ammunition in an unmodi?ed Weapon. The bloW back assembly is driven 2,940,438 A 3,127,885 A 3,527,194 A 3,824,981 A by a disposable cartridge of compressed gas self-contained in the handle of the pistol. Avalve integrated With the ?ring pin releases a burst of gas When the ?ring pin is impacted by the hammer. The gas pushes back the slide and recocks the 6/1960 MerZ 4/1964 Kline et al, 9/ 1970 Vadas et a1. 7/1974 Crane et al- 4,015,512 A * 4/1977 Feerrck ...................... .. 89/190 hammer for the next “round? This System provides law 4,302,190 A 11/1981 Shaw et a1‘ enforcement and military personnel a realistic tool to 4’38O’437 A 4/1983 Yarbomugh’ Jr‘ develop recoil management and target re-acquisition skills 4,480,999 A 11/1984 Witherell et al. 4,521,195 A 5,233,776 A 6/1985 Moberg 8/1993 Hessey ' 24 Claims, 4 Drawing Sheets U.S. Patent Mar. 22, 2005 rim Sheet 1 0f 4 US 6,869,285 B1 U.S. Patent Mar. 22,2005 Sheet 2 of4 US 6,869,285 B1 30 U.S. Patent Mar. 22, 2005 Sheet 3 0f 4 US 6,869,285 B1 6E v US 6,869,285 B1 1 2 TRAINING FIREARM When the gun is ?red much like a live round. These air bullets function Well enough but are expensive and must be used Within a feW minutes of air injection or they Will lose FIELD OF THE INVENTION their charge. In addition, the spent shells are not disposable; they are retrieved and recharged. The present invention generally relates to training ?re There is a need for a training ?rearm that utiliZes a laser arms and, more particularly, to training ?rearms that gener ate a realistic recoil effect Without using live ammunition. “?ring” device and yet provides realistic recoil Without BACKGROUND OF THE INVENTION need for a recoil system that can be retro?tted in a Wide LaW enforcement of?cers and many military personnel variety of actual ?rearms so that the training experience is as close as possible to ?eld experience With the same type of encumbering the trainee With extra equipment. There is a are trained and retested regularly for appropriate and accu ?rearm. There is a need for a training ?rearm With a recoil rate use of ?rearms in the line of duty. Various training system poWered by inexpensive, disposable compressed gas systems are available. In most of these training systems, the cylinders. There is a need for a training ?rearm Which avoids of?cer is exposed to a series of mock scenarios represented 15 clean up and recharging of spent shells. There is a need for on movie screens. The officer must make instantaneous a training ?rearm the looks, feels and operates like an actual decisions regarding When, Where and Whom to shoot as he ?rearm. There is a need for a training ?rearm that can be moves through the course. The handguns used during these exercises are not loaded With live ammunition. Rather, in most of these systems, a laser device of some sort is installed in the barrel. When the trigger is pulled, a laser beam is emitted from the barrel used inexpensively for dry ?ring experience. SUMMARY OF THE INVENTION The present invention comprises a training ?rearm com prising a receiver. Abarrel is supported on the receiver, and a slide is slidably mounted relative to the barrel for bidirec instead of a bullet. The screens and targets have laser sensitive screens so that, When the laser beam hits the screen, tional forWard and rearWard movement relative to the a “hit” is recorded usually in a computer system. In this Way, 25 receiver. A?ring pin is included behind the barrel. The ?ring the of?cer’s performance can be recorded and revieWed later for evaluation. To accurately train and test the of?cer’s performance, it is important that the conditions in the training facility closely simulate ?eld conditions Where live ammunition is being ?red. In particular, it is important to recreate as realistically as possible the Way a loaded handgun operates, including the recoil force of the gun While ?ring repeatedly. HoWever, if pin is mounted for movement betWeen a retracted position and a ?ring position. Also included in the training ?rearm is a ?ring assembly. The ?ring assembly includes a driver movable betWeen a cocked position and a ?ring position. In the ?ring position, the driver is adapted to impact the ?ring pin propulsively. In the cocked position, the driver is held in biased condition in preparation for release. The ?ring assembly further com only a laser is used in the Weapon, there is no reverse impact 35 prises a trigger adapted to release the driver. The slide is generated With the Weapon is “?red.” This deprives the adapted to recock the driver When it moves bidirectionally. trainee of critical experience in recoil management and Still further, the training ?rearm includes a bloW back target re-acquisition. The unrealistic feel of a laser-modi?ed training ?rearm has led to attempts to provide a training ?rearm With realistic 40 recoil. An authentic automatic or semi-automatic handgun cycles or re-cocks itself automatically after the ?rst round is assembly interposed betWeen the barrel and the ?ring pin. The bloW back assembly comprises a tube de?ning an external pressure chamber, and a housing de?ning an inter nal pressure chamber. The housing is movably received in the tube and has a valve opening ?uidly connecting the ?red. As each round is ?red, the explosive impact of the internal pressure chamber With external pressure chamber. A bullet not only propels the bullet out of the barrel but pushes closure member is movable in the housing betWeen an open the slide assembly back to recock the hammer. The ?ring 45 position in Which the valve opening is open and a closed chamber is simultaneously reloaded. Thus, the gun can be position in Which the valve opening is closed. The closure ?red repeatedly until the magaZine is emptied Without ever member is adapted to move in response to advancement of having to pull back the slide assembly or manually cock the the ?ring pin. hammer. HoWever, the recoil force is signi?cant, and novice A compartment is provided inside the ?rearm, the com shooters Will be distracted by it until they become accus partment being adapted to contain a compressed gas car tomed to it. The trainee must learn to recover quickly from tridge. The training ?rearm also has a conduit adapted to the impact of the recoil and immediately to realign the gun sight for the next shot. Various methods have been employed to cause the laser ?uidly connect the internal pressure chamber to a com pressed gas cartridge in the compartment. Either the tube or the housing is ?xed relative to either the modi?ed training Weapons to provide simulated recoil. 55 receiver or the slide, and the other one of the tube and the Some of these include the use of compressed gas, usually housing is ?xed relative to the other one of the receiver and CO2. In some cases, the compressed gas is supplied by a the slide. Thus, When a compressed gas cartridge is installed portable tank carried on the of?cer’s back. In others, the gas in the compartment, activation of the trigger causes the slide is stored in a remote tank and supplied to the ?rearm through to move rearWardly recocking the ?rearm. a ?exible conduit connected to the Weapon. HoWever, in both these systems, the Weapon is unnaturally tethered. This BRIEF DESCRIPTION OF THE DRAWINGS substantially affects the Way the of?cer carries himself and FIG. 1 is a side elevational vieW of a popular 9 mm handles his Weapon, and signi?cantly detracts from the reality of the experience. semi-automatic pistol. Another method in the prior art to simulate live ?re in a 65 FIG. 2 is a side elevational vieW of a training pistol made handgun is an “air” bullet. This is a bullet casing loaded With in accordance With the present invention, illustrating hoW similar to the authentic Weapon the inventive Weapon is. compressed gas, Which discharges and cycles the Weapon US 6,869,285 B1 3 4 FIG. 3 is a side elevational, partly sectional and cutaway vieW of the pistol shown in FIG. 2. FIG. 4 is an enlarged partly sectional vieW of the valve ?ring assembly comprises a driver and a trigger. The driver is movable betWeen a cocked position and ?ring position. In the ?ring position, the driver is adapted to impact the ?ring pin propulsively. That is, the driver is designed to impact the ?ring pin With suf?cient force and speed to activate the primer in the bullet cartridge. In the cocked position, the housing of the bloW back assembly. FIGS. 5A and 5B are enlarged, partly sectional, frag mented vieWs of the pistol shoWn in FIG. 2 illustrating the structure and operation of the bloW back assembly. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT With reference noW to the draWings in general and to FIG. 1 in particular, there is shoWn therein a 9 mm semi driver is held in biased condition in preparation for release by the trigger. The trigger is adapted to release the driver 10 When pulled or activated in the normal fashion by the operator of the Weapon. Thus, provides a training ?rearm that looks, feels and functions like the unmodi?ed ?rearm. automatic pistol, speci?cally a 1999 5900 Series Smith & Where the ?rearm is a semi-automatic pistol, as shoWn Wesson. The pistol is designated generally by the reference and described herein, the ?ring assembly 40 comprising a hammer 42 and a trigger 44, Which function as the corre numeral 10. As the structure and function of this type of pistol is Well knoWn, it Will not be described in detail herein. 15 sponding components do in the original Weapon. Accordingly, no detailed description Will be provided herein. Generally, such a pistol 10 comprises a frame or receiver 12 Similarly, the slide 36 in this preferred embodiment is Which supports the other components. The other main com adapted to recock the hammer 42, or other driver, When the ponents include a barrel 14, a slide assembly 16, a grip 18, slide is pushed back rearWardly either manually or auto a trigger 20, and a hammer 22. A magaZine 24 is received matically during repeated “?ring” of the Weapon. As used inside the handle 18. herein, “slide” denotes the corresponding component in any In use of the pistol 10, the hammer 22 ?rst is cocked either automatic or semi-automatic Weapon, such as the bolt in a by retracting the slide 16 or manually pulling back on the semi-automatic ri?e. hammer. Then, When the trigger 29 is pulled, it releases the hammer Which impacts the ?ring pin, driving it forWard. 25 The ?rearm 30 preferably comprises a handle 46 depend ing from the receiver 32. When the ?ring pin hits the primer on the back of the bullet cartridge, the propellant in the casing ignites, forcing the As mentioned above, training ?rearms typically are pro bullet out of the barrel and, at the same time, pushing the vided With a laser device of some sort that is interactive With slide 16 back over the hammer 22 recocking it. other components in a larger system, such as a laser Simultaneously, the empty casing is ejected, and a neW sensitive screen and a computer for recording, analyZing and round is moved up from the magaZine 24 into the ?ring playing back the of?cer’s performance on the course. To that chamber. end, the training pistol 30 of the present invention, prefer ably is equipped With a suitable laser assembly 50 in a ShoWn in FIG. 2 is a training ?rearm constructed in knoWn manner. This laser assembly 50 may take a variety of accordance With a preferred embodiment of the present invention and designated generally by the reference numeral 35 forms, depending on the particular training system employed. Some laser devices are activated by the vibration 30. As the draWings illustrate, the appearance of the training in the Weapon When the trigger is pulled. Others utiliZe an ?rearm 30 is virtually identical to the actual Weapon 10 it is electronic sWitch. For purposes of illustrating this training intended to replace. Indeed, as Will be described hereafter, in ?rearm, a laser With a simple mechanical sWitch 52 is the preferred practice of this invention, an actual ?rearm is merely modi?ed in accordance With this invention by ret 40 shoWn. Activation of this sWitch may be accomplished by the bloW black assembly, yet to be described. ro?tting it With the bloW back assembly. While the present invention is illustrated as a Smith & Referring still to FIG. 3, the training ?rearm 30 is pro vided With a bloW back assembly 60 interposed betWeen the Wesson 9 millimeter pistol particularly popular With laW barrel 34 and the ?ring pin 38. The bloW back assembly 60 enforcement, the present invention is not so limited. As Will become apparent, the invention is easily adapted to a Wide 45 is adapted to cycle the slide 36 in response to activation of the trigger 44, as in the unmodi?ed Weapon. Preferably, the range of ?rearms, including other types of semi-automatic bloW back assembly 60 comprises a tube 62 that de?nes an pistols (double and single action). In addition, gas-operated external pressure chamber 64. In the embodiment illustrated Weapons, such as AR 15 type Weapons, MP-5’s and P-90’s may be modi?ed in accordance With this invention. Still herein, the tube is ?Xed inside the rear of the slide 36. More preferably, the tube 62 has a closed rear end 66 With a ?ring further, pump shotguns, such as REM 870 pump riot guns, can be modi?ed to incorporate the recoil system of this pin passage 68 therethrough. invention. When retro?tting an authentic pistol, a cylindrically With reference noW also to FIG. 3, the preferred training shaped recess is reamed into the rear of the slide. A cylinder ?rearm 30 Will be described in more detail. Like the original is ?Xed inside this recess With a suitable bedding compound, pistol, the training pistol 30 comprises a receiver 32 that 55 such as a tWo-part epoXy, although other ?Xation methods forms the main structure of the Weapon. A barrel 34 is Will be apparent. The ?ring pin is shortened to form the supported on the receiver 32, as in the authentic pistol. A ?ring pin 38 With a forWard end 70. The ?ring pin 38 and slide 36 is slidably mounted on the receiver over the barrel passage 68 in the tube 62 are siZed to permit reciprocal 34 for bidirectional movement forWardly and rearWardly movement of the pin in the passage for a reason Which Will relative to the receiver 32. become apparent. It should be noted that, though the tube 62 is shoWn cylindrical in shape, this con?guration is not essential and Will vary With shape of other cooperating In this preferred training pistol 30, there is a ?ring pin 38, but it is substantially shorter than in the comparable, unmodi?ed pistol. The ?ring pin 38 is mounted in the receiver for movement betWeen a retracted position and a components. Referring still to FIG. 3 and noW also to FIG. 4, the bloW ?ring position, Which Will be explained in more detail beloW. 65 back assembly 60 may also include a housing 72 de?ning an internal pressure chamber 74. The housing 72 is siZed to be The pistol 30 also includes a ?ring assembly 40, Which may vary Widely depending on the ?rearm. Generally, the movable, preferably telescopically movable, in the tube 62. US 6,869,285 B1 5 6 In the preferred form, the housing 72 has a ?rst or front end In the preferred embodiment, the closure member com prises a rod 110 movable betWeen a rearWard position, illustrated in FIG. 1, and a forWard position, shoWn in FIG. 5B. Preferably, the rod includes a rear portion 112 compris 76 and a second or rear end 78. Avalve opening 80 is formed in the rear end 78. The valve opening 80 ?uidly connects the internal pressure chamber 74 in the housing 72 With the external pressure chamber 64 in the tube 62. In this embodiment, Where the tube 62 is ?xed to the moving slide 36, the housing 72 preferably is ?xed relative to the receiver 32, and more preferably is ?xed to the barrel 34 and aligned ing a rear end 114 and an enlarged portion, such as the conical section 116. The rear end 114 is siZed to be extend able through the valve opening 80, and the tapered or conical section 116 is siZed to seat in and thereby obstruct the thereWith. To that end, the housing 72 is provided With external threads 82 on its front end 76 to mate With internal threads 84 (FIGS. 5A and 5B) on the breech end of the barrel 34. It Will be apparent noW that the preferred placement of the valve housing 72 is generally aligned betWeen the ?ring pin 10 forWard end of the valve opening 80. Although the shape can vary, in this preferred embodiment a taper angle of 12 degrees per side, or 24 degrees included, Works Well. NoW it Will be noted that the front end 70 of the ?ring pin 38 and the rear end 114 of the rod 110 are correspondingly formed so that forWard movement of the ?ring pin causes the 38 and the barrel 34 generally in the position of What Would 15 front end to impact the rear end of the rod, thereby pushing be the ?ring chamber in the unmodi?ed pistol. It Will also be the rod forWardly toWards the position shoWn in FIG. 5B. appreciated that there are other Ways to mount the housing This opens the valve opening 80 and alloWs a rush of 72 in this position. For example, the housing 72 could be ?xed to the top of the gas cartridge frame 94, eliminating the pressuriZe gas therethough. The forWard end 70 of the ?ring housing. These and other con?gurations are contemplated by the present invention. The housing 72 conveniently may be formed of brass passage 68 When the gas pushes the pin 38 and tube 62 frame 90, the conduit could take the form of a passageWay “shoots” and the gas forces back the slide 36 to recock the ?rearm, readying the Weapon for next shot. The Weapon Will pin 38 may be provided With an annular seal or check valve, need to thread the barrel breech of the forWard end of the 20 such as the O-ring 120. This seal Will seat in the ?ring pin rearWardly, as shoWn in FIG. 5B. As shoWn in FIGS. 4, 5A and 5B, it is advantageous to bias the rod 110 in the rearWard position to maintain it in a tubing. Preferably, the rear end 78 of the housing 72 is formed of nylon, and may take the form of a ?ring pin 25 closed position keeping the valve opening closed. To that breech plug that is threadedly received in the brass tubing. end, the bloW back assembly 60 may include a coil spring 122 around the rod 110. Thus, When the advancing ?ring pin With continuing reference to FIG. 3, the bloW black 38 pushes the rod forWard (FIG. 5B), the spring 122 Will assembly 60 includes a compartment contained someWhere Within the Weapon to contain a cartridge of compressed gas. 30 compress. HoWever, upon WithdraWal of the ?ring pin 38, the spring 122 pulls the rod 110 back into the resting or The gas is used to drive the valve movement, as Will be closed position, shoWn in FIG. 5A. explained. Preferably, the cartridges to be used With the present invention are commercially available cartridges of As indicated above, Where the laser assembly 50 is activated by a simple mechanical sWitch 52, it is desirable to 12 gm carbon dioxide (CO2), such as the cartridge 90 shoW in FIG. 3. These cartridges are Widely available, inexpensive 35 have the bloW back assembly 60 activate this sWitch at the and disposable. Where the ?rearm is a hand gun or pistol same time it is recycling the Weapon. To this end, the rod 110 is provided With a forWard end 124 siZed and positioned to With a grip, such as the handle 46, the gas cartridge com impact the sWitch 52 When the rod is in the forWard or open partment may be advantageously placed inside the handle. position, as shoWn in FIG. 5B. To support and align the When retro?tting an existing Weapon, the magaZine Well provides an ideal compartment 92 for the gas cartridge 90. 40 forWard end 124 of the rod 110, the housing 72 may be equipped With a plug 126 threadedly received in the front Aframe 94 of some sort for supporting the cartridge may be installed in the magaZine Well after the magaZine is end 76 of the housing. A compression spacer 128 may be removed. The grip panels of the handle 46 may be perforated included, immediately behind the plug 126 to contain the to prevent ice build-up around the cartridge 90. front end of the spring 122. Seals, such as O-rings 130 and A conduit 98 is included to ?uidly connect the internal 45 132, may be included. NoW that the preferred structure of the training ?rearm 30 chamber 74 in the housing 72 With the gas cartridge 90. Preferably, the conduit 98 is ?exible and Will be rated at has been described, its operation Will be explained. To the 1000 psi. or higher. The ?rearm 30 may be provided With trainee, the Weapon 30 Will operate the same as the original, quick connect or push ?ttings 100 and 102 for attaching the unmodi?ed Weapon. Initially, the hammer 42 is cocked for conduit to the housing and the cartridge, respectively. The 50 the ?rst shot. The Weapon 30 is ?red by pulling the trigger 44. The trigger 44 releases the hammer 42, Which in turn ?tting 100 may be ?xed as by Welding to the housing 72 over impacts the ?ring pin 38. The advancing ?ring pin 38 pushes a passage 104 in the Wall of the housing. The ?tting 102 may be af?xed to the cartridge frame 94 for convenient connec forWard the rear end 114 of the rod 110, opening the valve opening 80 and advancing the forWard end 124 of the rod to tion to the cartridge as it is inserted in the compartment 92. Where the housing 72 is ?xed to the top of the cartridge 55 activate the laser sWitch 52. Thus, simultaneously, the laser formed through a block of metal forming the upper portion cycle every time the trigger is pulled until the gas supply in the cartridge 90 is spent. Referring still to FIG. 4, the bloW back assembly 60 further comprises a closure member movable in the housing 60 The propulsive effect of the burst of gas through the valve of the frame 94. 72 betWeen an open position and a closed position. In the assembly in the training pistol 30 closely simulates the feel open position, the valve opening 80 is open ?uidly connect ing the external pressure chamber 64 to the gas cartridge 90. In the closed position, the valve opening 80 is closed. In of normal recoil in an actual Weapon. HoWever, all the move in response to advancement or forWard movement of tethered to a remote supply of gas. It is almost as easy to the ?ring pin 38. replace a spent gas cartridge in this training Weapon as it is components of this training Weapon, including the source of compressed gas, are contained entirely Within the Weapon. addition, the closure member is adapted in some manner to 65 Thus, the trainee is not encumbered by a back pack or US 6,869,285 B1 7 8 to replace a magazine in an actual Weapon. No spent shells are expelled, Which have to be retrieved and recharged. The passage therethrough, Wherein the ?ring pin has a forWard end and is adapted to move reciprocally in the ?ring pin gas cartridges used by the training ?rearm are so inexpen passage, Wherein the closure member comprises a rod mov able betWeen a forWard position and a rearWard position, the sive that the modi?ed Weapon can be used for dry-?ring exercises. Most importantly, the bloW back assembly of this rod having a rear end extendable through the valve opening in the housing and an enlarged portion adapted to obstruct the valve opening When the rod is in its rearWard position, and Wherein the ?ring pin is siZed and positioned so that a invention can be retro-?tted into an actual Weapon of the same type that the trainee uses in the ?eld. Thus, the training exercise precisely duplicates the look, feel and function of the actual Weapon, including its true-to-life lock time, recoil forWard movement causes the forWard end to impact the rear and heft. 10 end of the rod to push the rod forWardly to move the Changes can be made in the combination and arrangement enlarged portion aWay from the valve opening. of the various parts and elements described herein Without 6. The training ?rearm of claim 5 Wherein the laser departing from the spirit and scope of the invention as comprises a sWitch and Wherein the rod further comprises a de?ned in the folloWing claims. forWard end adapted to activate the sWitch When the rod What is claimed is: 15 moves forWardly. 1. A training ?rearm comprising: 7. The training ?rearm of claim 6 Wherein the rod is a receiver; biased in the rearWard position to maintain closure of the a barrel supported on the receiver; valve opening. a slide slidably mounted for bidirectional forWard and 8. The training ?rearm of claim 7 Wherein the bloW back rearWard movement relative to the receiver; assembly further comprises a spring adapted to bias the rod in the rearWard position. 9. The training ?rearm of claim 8 further comprising a a ?ring pin behind the barrel, the ?ring pin mounted or movement betWeen a retracted position and a ?ring position; handle supported on the receiver and Wherein the compart ment is inside the handle. a ?ring assembly comprising: a driver movable betWeen a cocked position and the 25 ?ring position, Wherein in the ?ring position the driver is adapted to impact the ?ring pin 10. The training ?rearm of claim 2 further comprising a handle supported on the receiver and Wherein the compart ment is inside the handle. 11. The training ?rearm of claim 2 further comprising a laser assembly adapted to emit a laser signal When the propulsively, and Wherein in the cocked position the driver is held in biased condition in preparation for release; and a trigger adapted to release the driver; Wherein the slide is adapted to recock the driver When the 12. The training ?rearm of claim 11 Wherein the tube is ?xed to the slide and has a closed rear end With a ?ring pin slide moves bidirectionally; and a bloW back assembly interposed betWeen the barrel and passage therethrough, Wherein the ?ring pin has a forWard end and is adapted to move reciprocally in the ?ring pin the ?ring pin, the bloW back assembly comprising: a tube de?ning an external pressure chamber, a housing de?ning an internal pressure chamber, the trigger is activated. 35 passage, Wherein the closure member comprises a rod mov able betWeen a forWard position and a rearWard position, the rod having a rear end extendable through the valve opening in the housing and an enlarged portion adapted to obstruct the valve opening When the rod is in its rearWard position, nal pressure chamber With the external pressure 40 and Wherein the ?ring pin is siZed and positioned so that a housing movably received in the tube, the housing having a valve opening ?uidly connecting the inter chamber; a closure member movable in the housing betWeen an forWard movement causes the forWard end to impact the rear end of the rod to push the rod forWardly to move the open position in Which the valve opening is open and enlarged portion aWay from the valve opening. a closed position in Which the valve opening is 13. The training ?rearm of claim 12 Wherein the laser closed, Wherein the closure member is adapted to 45 comprises a sWitch and Wherein the rod further comprises a move in response to advancement of the ?ring pin; forWard end adapted to activate the sWitch When the rod a compartment inside the ?rearm adapted to contain a compressed gas cartridge; and a conduit adapted to ?uidly connect the internal pres sure chamber to a th compressed gas cartridge in the compartment; moves forWardly. 14. The training ?rearm of claim 13 Wherein the rod is biased in the rearWard position to maintain closure of the valve opening. 15. The training ?rm of claim 14 Wherein the bloW back Wherein one of the tube and the housing is ?xed relative assembly further comprises a spring adapted to bias the rod to one of the receiver and the slide, and Wherein the in the rearWard position. other one of the tube and the housing is ?xed relative 16. The training ?rearm of claim 13 further comprising a to the other one of the receiver and the slide; 55 handle supported on the receiver and Wherein the compart ment is inside the handle. Whereby, When the compressed gas cartridge is installed 17. The training ?rearm of claim 2 Wherein the tube is in the compartment, activation of the trigger causes the ?xed relative to the slide and the housing is ?xed relative to slide to move bidirectionally recocking the ?rearm. the receiver. 2. The training ?rearm of claim 1 Wherein the ?rearm is 18. The training ?rearm of claim 17 Wherein the housing a pistols. has a front end and Wherein the front end is ?xed to the 3. The training ?rearm of claim 2 Wherein the driver is a hammer. breech end of the barrel. 4. The training ?rearm of claim 3 her comprising a laser 19. The training ?rearm of claim 18 Wherein the, tube is ?xed to the slide and has a closed rear end With a ?ring pin assembly adapted to emit a laser trigger When the trigger is activated. 65 passage therethrough, Wherein the ?ring pin has a forWard 5. The training ?rearm of claim 4 Wherein the tube is ?xed end and is adapted to move reciprocally in the ?ring pin to the slide and has a closed rear end With a ?ring pin passage, Wherein the closure member comprises a rod mov US 6,869,285 B1 10 able between a forward position and a rearward position, the rod having a rear end eXtendable through the valve opening passage, wherein the closure member comprises a rod mov able between a forward position and a rearward position, the in the housing and an enlarged portion adapted to obstruct the valve opening when the rod is in its rearward position, and wherein the ?ring pin is siZed and positioned so that a rod having a rear end eXtendable through the valve opening in the housing and an enlarged portion adapted to obstruct the valve opening when the rod is in its rearward position, and wherein the ?ring pin is siZed and positioned so that a forward movement causes the forward end to impact the rear end of the rod to push the rod forwardly to move the enlarged portion away from the valve opening. forward movement causes the forward end to impact the rear end of the rod to push the rod forwardly to move the 20. The training ?rearm of claim 1 whey the driver is a hammer. 10 enlarged portion away from the valve opening. 23. The training ?rearm of claim 1 wherein the conduit is 21. The training ?rearm of claim 1 wherein the tube is ?exible. ?Xed relative to the slide and the housing is ?Xed relative to 24. The training ?rearm of claim 1 further comprising a the receiver. laser assembly adapted to emit a laser signal when the 22. The training ?rm of claim 1 wherein the tube is ?Xed to the slide and has a closed rear end with a ?ring pin 15 trigger is activated. passage therethrough, wherein the ?ring pin has a forward end and is adapted to move reciprocally in the ?ring pin