Duty Arms IndexPolice duty pistol switches: .40 to 9mm, SIG to Glock
Short answer: when police agencies replace their duty pistol, they move to 9mm and, more often than not, to Glock. 67 of 67 sourced caliber changes (100%) went to 9mm, led by 39 agencies leaving .40 S&W. 29 agencies swapped SIG Sauer for Glock, against 5 going from Glock to SIG. Most agencies (52.3%) stayed with the same maker. See today's caliber split and brand share.
Data coverage: Based on 151 agencies in the Duty Arms Index with both a sourced previous and a sourced current primary duty pistol (trade-in records, contracts, policy updates and agency announcements). SWAT and 1033 surplus guns are excluded. A switch counts when the agency adopted a maker or caliber it did not carry before and dropped one it no longer carries. Counts include only current entries with a public source; agencies not yet in the index, or without a sourced entry for this item, are not counted, so treat shares as a picture of the Duty Arms Index, not of every U.S. agency. Data last updated Oct 10, 2026.
- 151agencies with a sourced pistol change
- 67moved to 9mm from another caliber
- 72changed pistol maker
- 79kept the same maker
Caliber changes
Agencies whose sourced primary duty pistol changed caliber (67).
| From | To | Agencies |
|---|---|---|
| .40 S&W | → 9mm Luger | 39 |
| .45 ACP | → 9mm Luger | 17 |
| .357 SIG | → 9mm Luger | 10 |
| .40 S&W | → .45 ACP | 1 |
| .45 GAP | → 9mm Luger | 1 |
Brand changes
Agencies that replaced one maker's duty pistol with another's (72).
| From | To | Agencies |
|---|---|---|
| SIG Sauer | → Glock | 29 |
| Smith & Wesson | → Glock | 8 |
| SIG Sauer | → Smith & Wesson | 6 |
| SIG Sauer | → Walther | 6 |
| Glock | → SIG Sauer | 5 |
| Glock | → Smith & Wesson | 4 |
| FN | → Glock | 3 |
| SIG Sauer | → FN | 3 |
| Smith & Wesson | → SIG Sauer | 3 |
| Glock | → Shadow Systems | 2 |
| Beretta | → Smith & Wesson | 1 |
| Heckler & Koch | → Smith & Wesson | 1 |
Net winners and losers
Agencies gained from other makers minus agencies lost to them.
- Glock+29(+40 / −11)
- Walther+6(+6 / −0)
- Shadow Systems+3(+3 / −0)
- FN+1(+4 / −3)
- Staccato+1(+1 / −0)
- Heckler & Koch0(+1 / −1)
- Smith & Wesson−1(+12 / −13)
- Beretta−1(+0 / −1)
- SIG Sauer−38(+8 / −46)
Every sourced brand or caliber switch
114 agencies, most recent dated switches first. Each agency page shows the sources for both pistols.
| Agency | Previous | Current | Change | Year |
|---|---|---|---|---|
| Alameda County Sheriff's Office CA | SIG SAUER P226 / SIG SAUER P229 | Smith & Wesson M&P9 M2.0 | New maker + caliber | 2026 |
| Lordstown Police Department OH | Glock G22 Gen4 | Glock G45 Gen6 | Same maker, new caliber | 2026 |
| Parlier Police Department CA | Glock G22 | Glock G45 Gen6 | Same maker, new caliber | 2026 |
| Port Hueneme Police Department CA | SIG SAUER P320 | Smith & Wesson M&P9 M2.0 | New maker | 2026 |
| Fayetteville Police Department (Arkansas) AR | Glock G35 | Glock G45 | Same maker, new caliber | 2025 |
| Fishers Police Department IN | SIG SAUER P320 | Glock G45 MOS | New maker | 2025 |
| Logan County Sheriff's Department (Kentucky) KY | Glock .40 S&W pistol (model not stated) | Glock 9mm pistol (model not stated) | Same maker, new caliber | 2025 |
| Oxnard Police Department CA | SIG SAUER P320 | Smith & Wesson M&P9 M2.0 | New maker | 2025 |
| U.S. Immigration and Customs Enforcement Fed | SIG SAUER P320 | Glock G19 Gen5 MOS | New maker | 2025 |
| Wood County Sheriff's Office (West Virginia) WV | Glock G21 | Shadow Systems XR920 | New maker + caliber | 2025 |
| Biloxi Police Department MS | Glock G21 | Glock G45 | Same maker, new caliber | 2024 |
| Johnson City Police Department TN | Glock G21 Gen4 | Glock G45 Gen5 MOS | Same maker, new caliber | 2024 |
| Litchfield Police Department (New Hampshire) NH | SIG SAUER P229 | Heckler & Koch VP9 | New maker | 2024 |
| Pennsylvania State Police PA | SIG SAUER P227 | Walther PDP Compact / Walther PDP F-Series | New maker + caliber | 2024 |
| Indian River County Sheriff's Office FL | SIG SAUER P320 | FN 509 | New maker | 2023 |
| Leavenworth Police Department (Kansas) KS | Glock G22 Gen4 | Glock G17 Gen5 MOS | Same maker, new caliber | 2023 |
| Massachusetts State Police MA | Smith & Wesson M&P45 / Smith & Wesson M&P45 M2.0 | SIG SAUER P320 | New maker + caliber | 2023 |
| Milwaukee Police Department WI | SIG SAUER P320 | Glock G45 | New maker | 2023 |
| San Antonio Police Department TX | Smith & Wesson M&P40 | Smith & Wesson M&P9 M2.0 | Same maker, new caliber | 2023 |
| United States Coast Guard Fed | SIG SAUER P229 DAK | Glock G19 Gen5 MOS | New maker + caliber | 2023 |
| Columbus Division of Police OH | Smith & Wesson M&P40 | Smith & Wesson M&P9 M2.0 | Same maker, new caliber | 2020 |
| Florida Highway Patrol FL | Glock G37 Gen4 | Glock G45 MOS | Same maker, new caliber | 2020 |
| United States Secret Service Fed | SIG SAUER P229 | Glock G19 Gen5 MOS | New maker | 2019 |
| Hawaii Police Department HI | Smith & Wesson 9mm pistol (model not stated) | Glock G17 | New maker | 2017 |
| DeKalb County Police Department GA | Smith & Wesson M&P40 | Glock 9mm pistol (model not stated) | New maker + caliber | 2016 |
| Federal Bureau of Investigation Fed | Glock G23 | Glock G17M / Glock G19M MOS | Same maker, new caliber | 2016 |
| Indianapolis Metropolitan Police Department IN | Glock G22 | Glock G17M | Same maker, new caliber | 2016 |
| Grand Rapids Police Department MI | SIG SAUER P229 DAK | Glock G17 | New maker + caliber | 2015 |
| Bethany Beach Police Department DE | Glock G23 | SIG SAUER P229 | New maker | 2012 |
| Ada County Sheriff's Office ID | Glock G22 | SIG SAUER P320 | New maker + caliber | – |
| Alaska State Troopers AK | Glock G22 Gen4 | Glock G17 MOS | Same maker, new caliber | – |
| Ames Police Department IA | SIG SAUER P320 | Smith & Wesson M&P9 M2.0 | New maker | – |
| Arizona Department of Public Safety AZ | FN FNS-9 | Glock G17 Gen5 | New maker | – |
| Arkansas Game and Fish Commission Enforcement Division AR | Glock G21 | Glock G45 MOS | Same maker, new caliber | – |
| Baltimore County Police Department MD | FN FNS-40 | Glock G17 Gen5 | New maker + caliber | – |
| Baltimore Police Department MD | Glock G22 | Glock G45 MOS | Same maker, new caliber | – |
| Berkeley County Sheriff's Department (West Virginia) WV | Glock G19 / Glock G21 | Shadow Systems XR920 | New maker | – |
| Bismarck Police Department ND | SIG SAUER P320 | Walther PDP Pro | New maker | – |
| Bloomington Police Department (Illinois) IL | SIG SAUER P320 | Walther PDP | New maker | – |
| Burnet Police Department TX | SIG SAUER P320 | Staccato P | New maker | – |
| Cheshire Police Department CT | Heckler & Koch USP40 | Smith & Wesson M&P9 M2.0 | New maker + caliber | – |
| Chowan County Sheriff's Office NC | SIG SAUER P229R | Glock G45 / Glock G19 | New maker + caliber | – |
| Colorado State Patrol CO | Smith & Wesson M&P40 M2.0 | Shadow Systems XR920 | New maker + caliber | – |
| Concord Police Department (New Hampshire) NH | SIG SAUER P229R | SIG SAUER P320 | Same maker, new caliber | – |
| Connecticut State Police CT | SIG SAUER P220 | Glock G45 | New maker + caliber | – |
| Dallas Police Department TX | SIG SAUER Handgun (model not stated) | Glock 9mm pistol (model not stated) | New maker + caliber | – |
| Derby Police Department KS | SIG SAUER P320 / SIG SAUER P220 | Glock G45 | New maker | – |
| Des Peres Department of Public Safety MO | Glock G21 | Glock G45 MOS | Same maker, new caliber | – |
| Dunwoody Police Department GA | Glock G21 | Glock G17 Gen5 MOS | Same maker, new caliber | – |
| East Brunswick Police Department NJ | SIG SAUER P220 | Glock G45 Gen5 | New maker + caliber | – |
| East Haven Police Department CT | SIG SAUER P320 X-Carry | Glock G45 Gen5 MOS | New maker | – |
| Galesburg Police Department IL | SIG SAUER P320 | Glock G47 | New maker | – |
| Georgia Department of Natural Resources Law Enforcement Division GA | Glock G22 Gen4 | Glock G45 | Same maker, new caliber | – |
| Glenview Police Department IL | Glock G22 Gen4 | Glock G45 Gen5 MOS | Same maker, new caliber | – |
| Grand Blanc Township Police Department MI | SIG SAUER P320 / SIG SAUER P226 | Glock 9mm pistol (model not stated) | New maker | – |
| Grand Chute Police Department WI | Glock G22 Gen4 | Glock G17 Gen5 / Glock G19 Gen5 | Same maker, new caliber | – |
| Grand Prairie Police Department TX | Glock G22 | Glock 9mm pistol (model not stated) | Same maker, new caliber | – |
| Greensboro Police Department NC | SIG SAUER P320 | Glock G19 Gen5 | New maker | – |
| Hawaii Department of Law Enforcement HI | SIG SAUER P320 | Walther PDP Pro | New maker | – |
| Hillsboro Police Department (Missouri) MO | Glock G22 | Glock G45 MOS | Same maker, new caliber | – |
| Hillsborough County Sheriff's Office FL | FN FNS-9 | Glock G45 | New maker | – |
| Houlton Police Department ME | Smith & Wesson Handgun (model not stated) | Glock G45 | New maker | – |
| Killeen Police Department TX | SIG SAUER P320 | Glock Model not specified | New maker | – |
| Lacey Police Department WA | Glock G22 Gen4 | Smith & Wesson M&P9 M2.0 | New maker + caliber | – |
| Lancaster County Sheriff's Office (Nebraska) NE | Smith & Wesson M&P40 | Smith & Wesson M&P9 M2.0 | Same maker, new caliber | – |
| Lewiston Police Department (Maine) ME | SIG SAUER P320 | Walther PDP | New maker | – |
| Lloyd Harbor Police Department NY | Glock G23 | SIG SAUER P320 | New maker + caliber | – |
| Lombard Police Department IL | SIG SAUER P220 | Glock Model not specified | New maker + caliber | – |
| Los Angeles County Sheriff's Department CA | Beretta 92F | Smith & Wesson M&P9 | New maker | – |
| Louisville Police Department (Mississippi) MS | Glock G22 / Glock G23 | Glock G45 Gen5 | Same maker, new caliber | – |
| Maryland State Police MD | Glock G22 | Glock Model not specified / Glock G17 | Same maker, new caliber | – |
| Medina Police Department (Ohio) OH | Smith & Wesson Handgun (model not stated) | FN 509 | New maker | – |
| Milwaukee County Sheriff's Office WI | Glock Model not specified | SIG SAUER P320 | New maker | – |
| Montville Police Department CT | SIG SAUER P320 | Glock 9mm pistol (model not stated) | New maker | – |
| Nebraska State Patrol NE | Glock .45 pistol (model not stated) | Glock 9mm pistol (model not stated) | Same maker, new caliber | – |
| New Hampshire State Police NH | Smith & Wesson M&P45 M2.0 | Glock G45 Gen5 MOS | New maker + caliber | – |
| New Milford Police Department CT | SIG SAUER P320 | Glock G19 | New maker | – |
| New York State Police NY | Glock G21 | Glock G47 | Same maker, new caliber | – |
| North Carolina State Highway Patrol NC | Smith & Wesson M&P357 / SIG SAUER P226 | SIG SAUER P320 | Same maker, new caliber | – |
| North Dakota Highway Patrol ND | SIG SAUER P226 | SIG SAUER P320 | Same maker, new caliber | – |
| North Little Rock Police Department AR | Glock G22 | Glock G45 | Same maker, new caliber | – |
| North Slope Borough Police Department AK | Glock G21 | Glock G17 | Same maker, new caliber | – |
| Orange Police Department (Connecticut) CT | SIG SAUER P320 | Glock G45 | New maker | – |
| Orchard Lake Village Police Department MI | SIG SAUER P226 | Glock G45 Gen5 MOS | New maker + caliber | – |
| Orland Park Police Department IL | Glock G22 Gen4 | Glock G45 | Same maker, new caliber | – |
| Parma Heights Police Department OH | SIG SAUER P229R | SIG SAUER P320 | Same maker, new caliber | – |
| Phoenix Police Department AZ | Glock G22 | Glock G17 / Glock G21 / Glock G45 | Same maker, new caliber | – |
| Plant City Police Department FL | SIG SAUER P320 | Walther PDP Pro | New maker | – |
| Plymouth Police Department (Indiana) IN | SIG SAUER P320 | Glock G45 Gen5 | New maker | – |
| Pulaski Police Department (Virginia) VA | SIG SAUER P320 | Glock G45 | New maker | – |
| Rolla Police Department MO | Glock G17 | Smith & Wesson M&P9 M2.0 | New maker | – |
| Salem Police Department (Missouri) MO | SIG SAUER P320 | Smith & Wesson M&P9 M2.0 | New maker | – |
| San Francisco Police Department CA | SIG SAUER P226 | Smith & Wesson M&P9 M2.0 | New maker + caliber | – |
| San Mateo County Sheriff's Office CA | SIG SAUER P320 Carry / Smith & Wesson M&P9 / Smith & Wesson M&P40 / Smith & Wesson M&P45 | Glock G45 Gen5 | New maker | – |
| Savannah Police Department GA | Glock G17 | Smith & Wesson M&P9 M2.0 | New maker | – |
| Sedro-Woolley Police Department WA | Glock G22 | SIG SAUER P320 | New maker + caliber | – |
| SEPTA Transit Police Department PA | SIG SAUER P320 | Glock G17 | New maker | – |
| South Carolina Department of Natural Resources Law Enforcement Division SC | Glock G22 | Glock G45 | Same maker, new caliber | – |
| South Dakota Highway Patrol SD | SIG SAUER P226 | FN 509 MRD | New maker + caliber | – |
| Spring Hill Police Department (Tennessee) TN | Glock Model not specified | Smith & Wesson 9mm pistol (model not stated) | New maker | – |
| Stow Police Department OH | Glock G21 | Glock G45 | Same maker, new caliber | – |
| Strafford County Sheriff's Office NH | SIG SAUER P320 | Glock Model not specified | New maker | – |
| Tampa Police Department FL | Smith & Wesson M&P (generation not stated) | SIG SAUER P320 / Glock G45 | New maker | – |
| Tennessee Wildlife Resources Agency Law Enforcement Division TN | Glock G31 | Glock G17 Gen5 | Same maker, new caliber | – |
| Tulsa Police Department OK | Glock G22 Gen4 | Glock G17 Gen5 | Same maker, new caliber | – |
| University of Iowa Police Department IA | Smith & Wesson M&P40 | SIG SAUER P320 | New maker + caliber | – |
| Vermont State Police VT | SIG SAUER P320 / Smith & Wesson M&P40 | Glock G45 Gen5 MOS | New maker | – |
| Volusia County Sheriff's Office FL | Glock G35 | Glock 9mm pistol (model not stated) | Same maker, new caliber | – |
| Washington State Patrol WA | Smith & Wesson M&P40 | Smith & Wesson M&P9 M2.0 | Same maker, new caliber | – |
| Waynesburg Police Department PA | SIG SAUER P320 | FN 509 | New maker | – |
| West Valley City Police Department UT | SIG SAUER P320 | Glock Model not specified | New maker | – |
| Westfield Police Department (New York) NY | Glock G22 | Glock G19 | Same maker, new caliber | – |
| Worcester Police Department MA | Smith & Wesson M&P45 M2.0 | Glock G45 Gen5 MOS | New maker + caliber | – |
| Wyoming Highway Patrol WY | SIG SAUER P320 | Glock G45 | New maker | – |
Frequently asked
- How many police departments have switched from .40 S&W to 9mm?
- 39 agencies in the Duty Arms Index have a sourced record of moving their primary duty pistol from .40 S&W to 9mm, and 17 from .45 ACP to 9mm. Of 67 agencies with a sourced caliber change, 67 (100%) moved to 9mm.
- Are police departments switching from SIG Sauer to Glock?
- In the sourced records, 29 agencies replaced a SIG Sauer primary duty pistol with a Glock, while 5 went the other way (Glock to SIG Sauer).
- Which pistol brand are police agencies switching to most?
- Glock: it gained 40 agencies from other makers and lost 11, a net gain of 29 among 72 sourced brand changes.
- Do most agencies change brands when they replace their duty pistol?
- No. Of 151 agencies with a sourced previous and current primary duty pistol, 79 (52.3%) stayed with the same maker, often a newer generation or a 9mm version of the same pistol; 72 changed brands.
See also: 9mm vs .40 vs .45 · Glock vs SIG Sauer · pistol brand share · most common duty pistol