Manual / Guide
The factory's English-language instructions for the Borchardt C-93 as sold by DWM: description, numbered parts, loading, takedown and reassembly with hand-position plates. The source of the factory takedown quoted in the Borchardt C-93 dive.
\¢/, Mow ' Waffen- und /Syunitions fabriken BERLIN, S.W ° AUTOMATIC REPEATING PISTOL PATENTED IN ALL THE PRINCIPAL COUNTRIES. Deutsche Waffen- und Munitionstabriken. BERLIN S.W. AUTOMATIC ~ REPEATING PISTOL BORCHARDT PATENT. PATENTED IN ALL THE PRINCIPAL COUNTRIES. Introductory Remarks. Automatic firearms are divided into two distinct classes: In the first all the functions of opening and reloading are caused by the recoil, after the pro- jectile has left the barrel. In the second a portion of the propelling gases is utilized to operate the mechanism, before the projectile has left the muzzle of the barrel. The disadvantage of the latter class, in compa- rison with the former, shows itself in a lack of pre- cision in shooting and a greater amount of fouling of | the breechmechanism. Recoil is the motion of a firearm opposite to that of the projectile, it takes place as soon as the gases of the ignited powder begin to act upon the projectile in front and upon the breech of the arm in the rear. The motion of the projectile takes place simultaneously with the recoil of the arm in the re- versed ratio of the masses of these two bodies. The momentum which is imparted to the projec- tile carries it to the mark after leaving the barrel, and the force, which continues to act in the recoil of the arm, may be utilized for working the breechmechanism. eS ae ine automatic pistol, Borchardt Patent belongs to the class of recoil firearms. No gases escape, while the bullet is forced through the barrel. The barrel combined with the breechmech form a complete system of a single loader, which could be fired without the grip. This complete single loader is fitted into a grip in such a way, that it slides therein parallel to the bore of the barrel; the grip may thus be compared to a gunrest, The breech of this complete firing system remains perfectly closed during its first part of the recoil in the grip. During the last of the recoil, after the bullet has left the barrel and after the propelling gases have lost their pressure upon the breech, the opening of the breech- mechanism takes place. Plate I—-Ill will serve to illustrate the Borchardt- Pistol. The cuts represent: Plate I. Fig. A. & B. The firing system proper, in a closed and opened position, consisting of barrel, re- ceiver, locking mechanism, ting pin and sear. . Fig. C. The grip (gunrest) in which the complete firing system slides. The grip serves by means of the curve in the rear as buttpiece for opening the breech. The spring-box, ejector, trigger, safety and magazine rae shown attached to the grip. ee ge ; Fig. D. A complete locking mechanism ¢ ing of breechblock, extractor, firing bolt, firing-b spring and links. 5 aaa Fig. E. A pistol without buttstock. Fig. F. view. , Fig. G. A pistol with attached buttstock ri view. os, Fig. H. Side view and section of a filled ma- azine. Ss ye Fig. K. & L. Vertical, sections i085 naam 2 Plate Il. ae Numbered parts of the pistol, magazine, buttstock — and implements. - Plate IIL. Manipulations, as described, for taking apart and assembling etc. : Dx | =i Automatic functions of the Borchardt- The firing system Fig. A is driven back in the grip Fig. C by the recoil; the frictionrolls on the — projecting arm of the rear link of the togglejoint are forced downward by striking against the stationary curve in the grip, raising thereby the central joint of the links and drawing back the breechblock, which — carries with it the empty shell by means of the — extractor, until it is thrown out by the ejector. The momentum, which is imparted to the moving system Bd § is sufficient to overcome the tension of a double spring, which, acting upon the togglejoint, closes the breech again. During the forward movement of the breech- block the top cartridge is carried from the magazine into the chamber, and the firing bolt is cocked All the functions except the pulling of the wigger are therefore automatic. Properties and advantages of the Borchardt-Automatic Repeating Pistol. The pistol possesses all the qualities that are demanded in most modern firearms. It is absolutely safe, its parts are comparatively stronger than those of modern military rifles. The firing bolt is positively drawn back at cach opening of the breechmechanism. In case of a punctured primer, the gases pase out forward of the firingbolt-body. The safety locks the sear directly over the cocking notch. The loaded magazine can be inserted and with- drawn, while the mechanism is locked by the safety, The remaining number of cartridges may at once be ascertained by means of the holes in the side of the withdrawn magazine. The loading and unloading, locking and unlocking of the safety is performed, while retaining the pistol With the attached buttstock a target-range of 00 meters is obtained with a penetration of from 5 to 6 centimeters of pine. -s, hs! Sy The automatic functions of loading the chamber and closing the breech are performed with absolute certainty by means of the toggle-joint mechanism. The latter seems especially adapted for automatic firearms, inasmuch as the last straightening of the toggles exerts an infinite power in closing the breech. The functions of the mechanism for one single shot do not exceed one twentyfifth part of a second. therefore anticipated by the automatic action of the mechanism Of great advantage is the boxshaped magazine which encloses the 8 cartridges; it is quickly handled m loading and permits the use of greased ammunition. The mechanixm does not foul, because the breech is not opened before the bullet has left the barrel, and before the propelling gases have lost their pressure upon the breech As excellent precision in shooting is attained by the long distance between sights (315 mm) and the uni- form resistance to the recoil. The central grip has proved a great advantage in changing aim quickly, also in shooting on horseback. The attaching of the buttstock to the pistol requires but a few seconds. List of parts and implements of the — 3. Firing bolt. ; 4 Firing bolt spring with pin. 5. Breechblockscrew. 6 Connecting pin. ) 7. Sear with rollerpin and spring. 8. Sear screw. 9. Sear spring. 10. Coverplates right and left. ; . 1. Springbox with double closing spring, pin, spring- roll and boxbushing. 12. Springboxscrew. 13. Magazine holder. 14. Trigger with Spring and pin. 15. Barrel, front sight and receiver. 16. Grip, with rear sight, ejector and double recoil spring. 17. Safety. 18. Safety spring. 19. Trigger cover. 20. Trigger cover screw. 21. Cheekpiece right and left. 22. Cheekpiece screw. Magazine. Magazine box. Magazine cover. Magazine springs with caps. Magazine bottompiece with pin. Buttstock. 27. Wooden stock with ferrule and pin. 28. Connecting bolt with nut. 29. Connecting bolt pin. 30. Strap staple with screw. ans BC 31. Hook staple with screw. 32. Cheekpiece with bolt, spring, and plate. Implements. 33. Barring block with jointed cleaning rodandoilbox. 34. Lengthening piece for cleaning rod. 35. Screwdriver handle. 36. Screwdriver blades. 37. Drifts. 38. Leather cover for pistol laced to buttstock (see Plate I Fig. G). 39. Strap with carbine hook and button (see Plate [ Fig. F. & G. Directions for the manipulation of the Borchardt Repeating Pistol. Loading of the magazine. Take the magazine into the left hand and slide the cartridges with the right under the inward bent lips, assisting with a downward pressure of the indexfinger of the left upon the previously inserted cartridge. A full charge consists of 8 cartridges. faeacHDy os the sia DNS — 100 — the knob backward until the breech is fully opened (Plate Ill, Fig. X). This allows the top cartridge to rise in front of the breechblock. After releasing the knob, the breech closes instantly and the cartridge is pushed out of the magazine into the chamber of the barrel. Firing. In firing it is only necessary to pull the trigger; the pistol r ins loaded and cocked after each shot. Whenever the firing is discontinued the safety should be pushed up without fail. Removing the magazine. Press upon the magazine holder with the thumb of the right hand and pull the magazine out of the pistol grip with the left. The magazine can also be taken out, when all parts of the mechanism are locked by the safety. Discharging the chamber of the barrel. After removing the magazine open the breech slowly and the cartridge will fall through the grip into the hand. Cleaning the barrel. Remove the magazine and replace it by the wooden barring block, open the breech fully and push the bar up in front of the breechblock, the latter will now rest against the bar and is held back, while the barrel is being cleaned. ———_o aps Oy Taking apart for cleaning. Pull the trigger to release the firing bolt. Loosen the springbox-screw (see Fig. 1). Grasp the pistol with the right hand (see Fig. Il) and press with the thumb against the spring-box, while the screw is being taken out with the left, now release the pressure slowly and the springbox will follow the thumb (see Fig. Il) together with the closing pin. The latter is then unhooked from the stirrup. The right and the left coverplate are now raised sufficiently at the lower end to free them and are then turned sideways against their stobs (see Fig. IV) so that the connecting pin can be pushed out towards the facing side of the pistol. Remove the trigger-cover-screw (see Fig. V) and by means of a slight push upward the trigger- cover (see Fig. VI). After the removal of the trigger, the barrel and forked receiver with lock-mechanism can be pulled out of the guides and casing of the grip (see Fig. VII). The lock-mechanism is then separated in the same manner from the receiver (see Fig. VIII). The firing-bolt is taken out by unscrewing the breechblock screw with the special screw-driver hav- ing a central stud. The extractor must be pressed upward in order to be pulled out of the breech-block. A further separation of parts is seldom required. When it becomes necessary, all pins and bushings should be driven out toward the facing-side, from the right to the left. The sear can be taken out after removing the searscrew. — 1I2— The sear spring is pushed out of its seat with a screwdriver. The closing spring and ite bushing are freed by first removing the small holding pin and then pressing out the springhox-bushing ; this is done by inserting the springhox-screw and weing it as driver. The ejector and its spring fall out after the re- moval of the ejector pin. The cover plates will be released when they are raised over and tarned beyond their stops. The recoil-apring at the bottom in the rear part of the receiver casing of the grip can be pulled out forward after the recoil-spring-pin has been driven out. The cheek-pieces are removed by pressing against their inner face alter the screws are withdrawn. Hy pushing the safety downward after the remo- val of the left cheekpiece, it falls out, the safety spring is then taken out and the mayazine-holder can be pushed through the grip from the left to the opposite side. the treechblock, the toggles, the friction-rolls and the catchlever remain assembled as much as possible, they can be separated, however, by carefully driving out the connecting pins. The magazine springs and cover can be taken out, alter the bottompiece has been released by press- ing out the pin. Assembling is done in the reversed order from the above. One has to observe that the sear-screw ia turned 80, that the flat face on the lower cylindrical part will correspond with the groove in the receiver, When the receiver and the assembled mec anu pr inet Cee” is being pushed into the guides of j end of the ejector has to be fred sector oe breechtlock can pass freely over ite forward end; this is done by passing a screw driver through the springhox-opening in the grip and Pressing ap agains the under side of the projecting rear-end of the ejector (see Vig. IX). Attaching the buttstock. Insert the small tenon at the back of the epring- torn into the slot of the small end of stock and tan, the projecting roughed nat until the pistol ix firmly seated. Dates roferring to the Borchardt-Repeating Pistol, Weight of Pistol... 5... . . $2m8 of buttstock leather bag and strap Mths m2 of magazine <3. 3.2 eae is A loaded cartridge . . . , . 1055 5 7 of cartridge case... , 4! oa of steelcovered bullet. . . . 550 es a of powder ¢o.0 eiettiswaeewen OAS an Length of cartridge . . . 2... . 35 Millimeter n> 8 band VG 60 Caliber of barrel 2.) , 16S Twist of rifling (4 grooves) . . . . 250 = wv PLATE I.