Drop Safety, the Voluntary Upgrade, and the Litigation — from the Record

No subject connected with the P320 is argued about more heatedly than its safety, and none is more often summarised badly. This volume does not take a side. It sets down, from primary documents, what SIG Sauer has said, what the Army’s own testers recorded, what courts have ruled, what juries have found, and what government agencies have done — each attributed to the party that said or did it, and each labelled for what it is: an allegation (a complaint), a ruling (an order or opinion), a verdict (a jury’s finding), a settlement, or an agency action.

Where a fact rests only on press reporting, that is stated. Words such as “defective” and “safe” appear only inside quotations or attributed to whoever used them.

The account runs to 19 September 2026. Several of the cases described are still open.

3.1 August 2017 — the Drop Issue and the Voluntary Upgrade

3.1.1 The sequence

Table 1 — The sequence

Date	Event	What kind of record
January 2017	A Stamford, Connecticut police officer’s holstered P320 discharges after being dropped, according to his later complaint	Allegation — Sheperis v. Sig Sauer, Inc., No. 3:17-cv-01318 (D. Conn.), filed 4 August 2017
Early August 2017	The Dallas Police Department removes the P320 from its approved list pending a fix	Press reports only; no Dallas primary document located
About 7–8 August 2017	A retailer’s published drop tests report discharges when the pistol strikes at a particular rear-of-slide angle	Press reports only; the retailer’s own publication was not retrieved
8 August 2017	SIG announces a “Voluntary Upgrade” of the P320	SIG press release
14 August 2017	Programme details published	SIG programme page

3.1.2 What SIG said

SIG’s release of 8 August 2017 made two statements that are often quoted separately and belong together:¹

“The P320 meets U.S. standards for safety, including the American National Standards Institute (ANSI) / Sporting Arms Ammunition Manufacturers’ Institute, Inc. (SAAMI®), National Institute of Justice (NIJ), as well as rigorous testing protocols for global military and law enforcement agencies.”

“Recent events indicate that dropping the P320 beyond U.S. standards for safety may cause an unintentional discharge. As a result of input from law enforcement, government and military customers, SIG has developed a number of enhancements in function, reliability, and overall safety including drop performance.”

And, on the military pistol: “The M17 variant of the P320, selected by the U.S. government as the U.S. Army’s Modular Handgun System (MHS), is not affected by the Voluntary Upgrade.”

3.1.3 What the upgrade changed

From SIG’s programme FAQ as it stood in September 2017:²

• The parts. “an alternate design that reduces the physical weight of the trigger, sear, and striker while additionally adding a mechanical disconnector.” “The new design has a physically lighter trigger, sear, and striker assembly with the addition of a mechanical disconnector.”
• Why. “we have confirmed that usually after multiple drops, at certain angles and conditions, a potential discharge of the firearm may result when dropped. Although it is a rare occurrence, with very specific conditions, SIG SAUER is offering an upgrade to all of its current P320 owners.”
• Which pistols. “Due to the modularity of the pistols, which all share the same trigger group, all calibers and pistol sizes are affected.”
• Where, and what it cost. “This work must be done at the SIG SAUER factory.” “The upgrade is being offered to our consumers at no cost,” with shipping paid both ways. The slide is machined for the disconnector.
• How to tell. “The most obvious external difference is the lightweight trigger. It has a thinner profile than the standard curved trigger.”
• How long. “Is there an expiration date for the P320 Upgrade program? No.”
• Production. A later version of the page states: “The functional enhancements have been made for all current and future P320 shipments.”³

SIG’s own framing of the risk, from the same FAQ: “Minimal reported drop-related P320 incidents have occurred in the US commercial and law enforcement markets, with hundreds of thousands of guns delivered to date.” SIG noted that its drop testing uses “only primed cases with the powder and projectile removed.”

⚠ The drop angle. The angle usually quoted — the rear of the slide striking first, at about 30 degrees — comes from the retailer’s tests and press headlines, not from SIG’s primary text, which speaks only of “certain angles and conditions.” Whether that orientation lies outside the ANSI/SAAMI drop standard is a claim this volume does not make, because the standard’s text was not examined.

3.1.4 What the Army’s testers had already found

SIG and the Army said the M17 was “not affected.” The Director of Operational Test and Evaluation’s FY2017 report adds something that statement does not contradict but does qualify: the MHS candidate had itself discharged in drop testing, and had been changed before the production-representative pistols were tested.⁴

“During drop testing in which an empty primed cartridge was inserted, the striker struck the primer causing a discharge. The Army directed SIG SAUER to develop an ECP to correct this deficiency. SIG SAUER modified the trigger mechanism to eliminate this deficiency. Subsequent testing validated that this ECP corrected the deficiency and the pistol no longer fired when dropped. The MHS with this ECP modification was submitted as the production-representative pistol for PVT, LFT&E, and IOT&E.”

DOT&E also recorded that the change used “lightweight components in the trigger group mechanism” and that “two trigger splintering hardware deficiencies observed during the IOT&E … may be correlated with the ECP.” Both accounts come from primary sources and they are compatible: the fielded M17 was not affected by the commercial upgrade because the equivalent change had already been made to it. They are not merged here into “the M17 never had the problem,” which is not what either document says. Volume 1 sets the finding in the context of the rest of the Army’s testing.

3.1.5 Why it was a “voluntary upgrade” and not a recall

The vocabulary follows from federal law. The Consumer Product Safety Act’s definition of a “consumer product” excludes, at 15 U.S.C. § 2052(a)(5)(E), “any article which, if sold by the manufacturer, producer, or importer, would be subject to the tax imposed by section 4181 of the Internal Revenue Code” — and § 4181 is the manufacturers’ excise tax on pistols, revolvers and other firearms. A second, standalone provision (Pub. L. 94-284, § 3(e), 1976) directs that the Consumer Product Safety Commission “shall make no ruling or order that restricts the manufacture or sale of firearms.”⁵

The consequence, stated as an inference from those texts: no federal consumer-safety agency can order a pistol recalled, so a maker’s response takes whatever form the maker chooses. SIG chose a free, voluntary, non-expiring upgrade for the P320 in 2017, and in the same year described a separate action on its AR-pattern rifles as a “mandatory recall” — its own word for its own programme, not an agency order.

3.1.6 Where the commercial P320-M17 sits

The commercial P320-M17 was introduced on 18 July 2018 and shipped from August 2018, about a year after SIG stated that the enhancements were being made to “all current and future P320 shipments.”⁶ That places commercial M17 production after the upgrade entered production. That is an inference from dates, not a SIG statement about the M17 specifically, and SIG’s serial-number lookup is the way to confirm it for an individual pistol.

3.2 The Later Litigation — What Is Alleged, and by Whom

From 2017 onward, suits have been filed alleging that P320-series pistols discharged without a trigger pull, or that the pistol’s design — a relatively light, short trigger with no manual safety or tabbed trigger on most variants — was defective. A search of federal dockets on 19 September 2026 returned 82 cases with “Sig Sauer” in the caption and “P320” in the record; that is a search count, not a verified count of discharge suits, and most of those cases are complaints — allegations only.⁷

SIG’s stated position is equally clear. In its own words (7 March 2025): “The P320 CANNOT, under any circumstances, discharge without a trigger pull – that is a fact. The allegations against the P320 are nothing more than individuals seeking to profit or avoid personal responsibility.”⁸ Its retained expert’s opinion, as recorded by the Sixth Circuit, is “that the P320 is not defectively designed, that the P320 is designed for users who do not want to use a manual safety on their pistol.” In litigation SIG has treated the 2017 drop issue as distinct from the later allegations, moving in one case to exclude evidence of “DROP-FIRE DISCHARGE INCIDENTS.”⁹

3.2.1 What the courts of appeals have ruled

Table 2 — What the courts of appeals have ruled

Case	Court and date	Ruling
Davis v. Sig Sauer, Inc., 126 F.4th 1213	6th Cir., 27 Jan 2025	Affirmed exclusion of plaintiff’s experts on causation; held they “may properly testify about potential design defects in the P320”; vacated summary judgment for SIG and remanded. One judge dissented.
Slatowski v. Sig Sauer, Inc., No. 24-1639	3d Cir., 1 Aug 2025 (precedential)	Same pattern: causation exclusion affirmed, summary judgment for SIG reversed — “Whether Slatowski is telling the truth is now for the jury to decide.”
Herman v. Sig Sauer, 2025 WL 1672350	10th Cir., 13 Jun 2025 (unpublished)	Went against the plaintiff on its record; the Third Circuit expressly departed from its approach. Opinion text not retrieved.
Glasscock v. Sig Sauer, Inc., No. 25-2707	8th Cir., 16 Jul 2026	Vacated certification of a Missouri class of buyers of P320s without a thumb safety and ordered the suit dismissed: a named plaintiff who “admits that he has neither inadvertently discharged his P320 nor otherwise ‘had any issues with the pistol’” lacked standing.

⚠ The Davis and Slatowski rulings concern what evidence a jury may hear. Neither is a finding that the pistol is defective, and neither court said so.¹⁰¹¹¹²

3.2.2 What juries have found

Table 3 — What juries have found

Case	Court	Verdict and outcome
Guay v. Sig Sauer	D.N.H., July 2022	Jury verdict that SIG describes as “in favor of SIG SAUER”; the verdict form was not retrieved
Lang v. Sig Sauer, No. 1:21-cv-04196	N.D. Ga., 20 Jun 2024	Jury found the pistol “defectively designed … because it did not possess a tabbed trigger,” that warnings were inadequate, and that the plaintiff was not negligent; $2,350,963.43. SIG’s post-trial motions were denied on 6 Feb 2025. SIG’s appeal (11th Cir. No. 25-10810) was argued 24 Feb 2026 and was undecided on 19 Sept 2026.
Abrahams v. Sig Sauer	Philadelphia C.C.P., Nov 2024	Reported award of $1 million compensatory and $10 million punitive; SIG announced on 16 June 2025 that the trial judge had vacated the punitive award. No court document was retrieved; this row rests on press reports and SIG’s release.
Desrosiers v. Sig Sauer, No. 1:22-cv-11674	D. Mass., July 2025 jury; judgment 9 Sept 2026	The jury found that SIG “defectively designed the P320 pistol” and that the defect caused the officer’s injury — and that SIG had proven its defence that the plaintiff used the pistol unreasonably, which “barred recovery.” Judgment for SIG. Both halves are the court’s record.
Cole v. Sig Sauer, No. 1:23-cv-00327	D. Me., 7 Aug 2026	Jury answered no to defect on every theory — strict liability, negligence and warranty. Judgment for SIG.

One case, Catatao v. Sig Sauer (D. Mass.), was settled on the eve of trial in January 2025; the terms are not public.^9131415

3.2.3 Grouped and government suits

• No multidistrict litigation has been formed; no Judicial Panel on Multidistrict Litigation order concerning the P320 was found. Cases have instead been grouped by multi-plaintiff filings: Armendariz v. Sig Sauer in the District of New Hampshire, SIG’s home district, with a bellwether process and a trial window beginning 4 January 2028; and Blade v. Sig Sauer in the Eastern District of Pennsylvania, where the court denied SIG’s motions to dismiss or sever on 5 March 2026.⁷¹⁶
• The State of New Jersey sued SIG in 2025 under its firearm-industry public-safety statute (N.J.S.A. 2C:58-35), its Products Liability Act and its Consumer Fraud Act. SIG removed the case to federal court; a magistrate judge recommended on 27 July 2026 that it be sent back to state court. Allegations only.¹⁷

3.3 What Agencies Did

3.3.1 Air Force Global Strike Command, July–August 2025

On 22 July 2025 the command announced that it “has paused use of the M18 Modular Handgun System, effective July 21, 2025, until further notice,” following “a tragic incident at F.E. Warren AFB, WY, on July 20, 2025, which resulted in the death of a Security Forces Airman.” The release asserted no cause.¹⁸

On 24 August 2025 it reported the result:¹⁹

“Air Force Global Strike Command has completed a comprehensive inspection of its 7,970 M18 Modular Handgun Systems … The inspection process identified discrepancies with 191 weapons across the command’s M18 inventory. The primary discrepancy was related to component wear. The most frequent issues centered on problems with the safety lever, striker assembly and sear. … A review of weapon discharges in AFGSC showed that none were attributed to weapons malfunction.”

Arming with inspected M18s resumed on 25 August 2025. By the command’s own figures, 191 of 7,970 pistols — 2.4 per cent — had a discrepancy. SIG’s statement on the reinstatement quoted the no-malfunction finding and did not mention the 191; both are stated here.²⁰ Press reports of later courts-martial describe the fatal discharge at F.E. Warren as a handling event; no Air Force primary release confirming that was located.

3.3.2 Washington State Criminal Justice Training Commission, 2024–2025

After an October 2024 academy incident that the commission’s report characterises as “an un-commanded discharge,” the commission temporarily barred the P320 from its property, extended the bar to the M17 and M18 on the basis of “Confirmed similarities,” heard SIG’s presentation, and on 24 February 2025 its executive director wrote: “I found sufficient information to prohibit the current Sig Sauer P320, M17, and M18 firearms from all properties owned or leased by the WSCJTC, indefinitely.” The report states that “It is not the obligation or objective of the WSCJTC Executive Director to dispel or prove any causation.” SIG and others appealed; the outcome was not found. This is a prohibition on the commission’s premises, not a state law.²¹

3.3.3 Reported, not confirmed from a primary document

• U.S. Immigration and Customs Enforcement. A July 2025 internal memo was reported to withdraw authorisation to carry the P320. No ICE or DHS release was located. SIG stated the same month that ICE had “extended their existing P320 contract through July 2027”; the extension was not checked against federal contract records.²²
• An FBI Ballistic Research Facility report on a Michigan State Police M18 that discharged while holstered in July 2024 was reported in July 2025. The report itself was not obtained, and none of its wording is quoted here. SIG’s published account says later FBI testing produced “zero instances of failures.”²²
• Milwaukee Police Department replaced its P320s in 2022–2023, according to press reports; no city document was located.

3.3.4 Agencies that kept or adopted it

SIG’s releases list adoptions by several state police agencies and foreign militaries; those are SIG’s statements. One is directly relevant to the owner’s state: SIG announced on 16 July 2025 that “the Michigan State Police has fully transitioned their agency to the SIG SAUER P320/M18 pistol” with a SIG optic and light as its issued handgun. No Michigan State Police release was located.²³ SIG also stated in July 2025 that “M17 and M18 pistols remain on active duty with all branches of the U.S. Military.”

3.4 What Legislatures Did

No state enactment that bans or restricts the P320 by name was found. The legislation that exists runs the other way:²⁴

• New Hampshire, RSA 507-D:6 (2025). A firearm maker “shall not be liable in tort under any theory of defective product design, failure to warn, negligence, strict product liability, or any other claim based on the absence or presence of” a magazine disconnect, a loaded-chamber indicator, authorised-user technology, or “(d) An external mechanical safety, including but not limited to a hinged, pivoting, or tabbed trigger safety.” Liability is preserved for “an actual manufacturing defect.” The statute does not name SIG or the P320. Whether it reaches suits already pending — which matters, since many P320 suits are in New Hampshire — was not established.
• Florida, CS/HB 1551 (2026), a comparable bill, “Died in Rules” in the Senate on 13 March 2026.

3.5 What Bears on the Pistol Documented Here

Three facts from the record connect to this particular pistol, and they are stated without inference beyond what the record supports.

1. The commercial P320-M17 was the variant sold with a manual thumb safety. SIG’s manual states that it “come[s] equipped with an ambidextrous manual safety.” The Missouri class in Glasscock was defined as buyers of P320s “without an external thumb safety,” and the design findings in Lang and Desrosiers turned on the absence of a thumb safety or tabbed trigger.
2. On the pistol documented here, that thumb safety has been removed to fit the Raider X chassis, whose maker supplies a “Built in trigger block manual safety” in its place (Volume 4). The pistol still has a manual safety; it is a different mechanism, in a different part, from a different maker, and no court or agency record examined addresses that configuration.
3. Maintenance is where the AFGSC findings bear on an owner. The command’s most frequent discrepancies were “the safety lever, striker assembly and sear,” attributed primarily to “component wear,” and its fix was inspection at intervals. Volume 8 sets out SIG’s own function check.

3.6 Settled, Contested, Open

Table 4 — Settled, Contested, Open

Question	Status on 19 September 2026
SIG offered a free, factory, non-expiring upgrade of the P320’s trigger, sear and striker in 2017	Settled — SIG’s own record
The Army’s MHS candidate discharged in drop testing and was changed before production testing	Settled — DOT&E FY2017
Whether a P320 can discharge without a trigger pull	Contested — alleged in many complaints; denied by SIG; no appellate court has decided it
Juries finding a design defect	Mixed — Lang (for plaintiff, on appeal), Desrosiers (defect found, judgment for SIG), Cole (no defect), Guay (for SIG per SIG)
Whether plaintiffs’ experts may testify on design	Yes in the 6th and 3rd Circuits; the 10th Circuit went the other way on its record
A class of buyers whose pistols never malfunctioned	No standing — 8th Circuit
Lang on appeal; Armendariz and Blade; New Jersey’s suit	Open

References

Footnotes

1. SIG Sauer, “SIG SAUER Issues Voluntary Upgrade of P320 Pistol,” press release, 8 August 2017. sigsauer.com refuses automated requests; read from the Internet Archive capture of SIG’s own page: https://web.archive.org/web/20170809130832/https://www.sigsauer.com/press-releases/sig-sauer-issues-voluntary-upgrade-p320-pistol/ ↩

2. SIG Sauer, “P320 Voluntary Upgrade” programme page and FAQ, Internet Archive capture of 12 September 2017: https://web.archive.org/web/20170912034831/https://www.sigsauer.com/support/p320-voluntary-upgrade/ ↩

3. SIG Sauer, “P320 Voluntary Upgrade Program,” Internet Archive capture of 1 February 2022: https://web.archive.org/web/20220201160859/https://www.sigsauer.com/support/p320-voluntary-upgrade-program/ ↩

4. Director, Operational Test and Evaluation, FY2017 Annual Report, “XM17/XM18 Modular Handgun System (MHS).” https://www.dote.osd.mil/Portals/97/pub/reports/FY2017/army/2017mhs.pdf (accessed 2026-09-19). ↩

5. 15 U.S.C. § 2052(a)(5)(E), https://www.law.cornell.edu/uscode/text/15/2052 ; 26 U.S.C. § 4181, https://www.law.cornell.edu/uscode/text/26/4181 ; Pub. L. 94-284, § 3(e), 90 Stat. 504 (1976), printed as a note to 15 U.S.C. § 2080, https://www.law.cornell.edu/uscode/text/15/2080 (all accessed 2026-09-19). ↩

6. SIG Sauer, “SIG SAUER Brings the U.S. Army’s M17 to the Commercial Market,” 18 July 2018; read from the Internet Archive capture of SIG’s own page. ↩

7. CourtListener (Free Law Project) RECAP docket and opinion search, queried 19 September 2026; docket texts for Sheperis (No. 3:17-cv-01318, D. Conn.), Armendariz (No. 1:22-cv-00536, D.N.H.) and others. https://www.courtlistener.com/ ↩ ↩²

8. SIG Sauer, “The Truth About the P320,” 7 March 2025; read from the Internet Archive capture of SIG’s own page. ↩

9. Lang v. Sig Sauer, Inc., No. 1:21-cv-04196-ELR (N.D. Ga.): jury verdict form, ECF 131 (20 June 2024); order on post-trial motions, ECF 179 (6 February 2025); SIG’s motion in limine, ECF 58. Eleventh Circuit No. 25-10810. https://www.courtlistener.com/docket/69869680/robert-lang-v-sig-sauer-inc/ ↩ ↩²

10. Davis v. Sig Sauer, Inc., 126 F.4th 1213 (6th Cir. 2025). https://www.courtlistener.com/opinion/10321086/timothy-eugene-elvis-davis-v-sig-sauer-inc/ ↩

11. Slatowski v. Sig Sauer, Inc., No. 24-1639 (3d Cir. 1 August 2025) (precedential). https://www.courtlistener.com/opinion/10646257/keith-slatowski-v-sig-sauer-inc/ ↩

12. Glasscock v. Sig Sauer, Inc., No. 25-2707 (8th Cir. 16 July 2026). https://www.courtlistener.com/opinion/10932016/joshua-glasscock-v-sig-sauer-inc/ ↩

13. Desrosiers v. Sig Sauer Inc., No. 1:22-cv-11674-PBS (D. Mass.), memorandum and order, ECF 214 (9 September 2026); judgment ECF 215. ↩

14. Cole v. Sig Sauer Inc., No. 1:23-cv-00327-JCN (D. Me.), jury verdict, ECF 220 (7 August 2026); judgment ECF 225. ↩

15. Catatao v. Sig Sauer Inc., No. 1:22-cv-10620-PBS (D. Mass.), settlement order of dismissal, ECF 205 (13 January 2025). ↩

16. Blade v. Sig Sauer, Inc., No. 2:25-cv-06645-MAK (E.D. Pa.), memorandum, ECF 16 (5 March 2026). ↩

17. Platkin (later Davenport), Attorney General of New Jersey v. Sig Sauer, Inc., No. 2:25-cv-17797 (D.N.J.), first amended complaint, ECF 8 (19 December 2025); report and recommendation, ECF 36 (27 July 2026). ↩

18. Air Force Global Strike Command, “AFGSC pauses use of M18 Modular Handgun System,” 22 July 2025. Read from the Internet Archive capture of the command’s page: https://web.archive.org/web/20260909151311/https://www.afgsc.af.mil/News/Press-Releases/Article/4252463/afgsc-pauses-use-of-m18-modular-handgun-system/ ↩

19. Air Force Global Strike Command, “AFGSC Completes M18 Handgun Inspection, Returns to Service,” 24 August 2025. https://www.afgsc.af.mil/News/Article-Display/Article/4284351/afgsc-completes-m18-handgun-inspection-returns-to-service/ (read via Internet Archive capture). ↩

20. SIG Sauer, “U.S. Air Force Global Strike Command Reinstates the M18 Pistol,” 27 August 2025; read from the Internet Archive capture of SIG’s own page. ↩

21. Washington State Criminal Justice Training Commission, Sig Sauer P320 Pistol Report, February 2025, https://cjtc.wa.gov/sites/default/files/2025-02/Sig%20Sauer%20P320%20Report%20February%202025.pdf ; stakeholder notice of 24 February 2025, https://cjtc.wa.gov/sites/default/files/2025-02/Sig%20Sauer%20Stakeholder%20Notice.pdf (both accessed 2026-09-19). ↩

22. SIG Sauer, “United States Immigration and Customs Enforcement Extends SIG SAUER P320 Contract Another Two Years” and “P320 Information,” both 29 July 2025; read from Internet Archive captures of SIG’s own pages. The ICE memo and the FBI report are known only from press reporting. ↩ ↩²

23. SIG Sauer, “SIG SAUER P320/M18 and P365 Fielded by the Michigan State Police,” 16 July 2025; read from the Internet Archive capture of SIG’s own page. ↩

24. New Hampshire RSA 507-D:6, https://gc.nh.gov/rsa/html/LII/507-D/507-D-6.htm ; Florida Senate, CS/HB 1551 (2026), https://flsenate.gov/Session/Bill/2026/1551 (both accessed 2026-09-19). ↩