Duty Arms Index
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Most common police patrol rifles

The Colt AR-15 is the most common commercially purchased patrol rifle in the index (75 agencies). 288 agencies hold U.S. military-surplus rifles (M16/M14 family, typically via the federal 1033 program), counted separately below.

Data coverage: Based on 510 agencies in the Duty Arms Index with a current, sourced rifle or carbine entry. 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.

Top patrol rifles (commercial purchase)

Agencies with a current sourced entry; share is of all 510 agencies with a rifle entry.

  1. Colt AR-155.56x45mm / .22375 (14.7%)
  2. Colt M4 Carbine5.56x45mm / .22352 (10.2%)
  3. Smith & Wesson M&P155.56x45mm / .22325 (4.9%)
  4. SIG SAUER M4005.56x45mm / .22314 (2.7%)
  5. Daniel Defense DDM45.56x45mm / .22313 (2.5%)
  6. Colt LE69205.56x45mm / .22311 (2.2%)
  7. SIG SAUER MCX5.56x45mm / .22310 (2%)
  8. Colt M4 Commando5.56x45mm / .2238 (1.6%)
  9. Bushmaster XM-155.56x45mm / .2237 (1.4%)
  10. FN FN 155.56x45mm / .2235 (1%)
  11. SIG SAUER SIG5165.56x45mm / .2235 (1%)
  12. Heckler & Koch HK4165.56x45mm / .2234 (0.8%)
  13. Rock River Arms LAR-155.56x45mm / .2234 (0.8%)
  14. Bravo Company Manufacturing CQB MCMR 115.56x45mm / .2233 (0.6%)
  15. Colt LE69335.56x45mm / .2233 (0.6%)
  16. ArmaLite AR-10.308 Winchester / 7.62x51mm2 (0.4%)
  17. Bravo Company Manufacturing BCM45.56x45mm / .2232 (0.4%)
  18. Bushmaster AR-155.56x45mm / .2232 (0.4%)
  19. Bushmaster XM15-E2S5.56 NATO2 (0.4%)
  20. Daniel Defense MK185.56x45mm / .2232 (0.4%)
  21. U.S. military surplus (M16/M14)288 (56.5%)

By manufacturer (commercial)

  1. Colt135 (26.5%)
  2. SIG SAUER29 (5.7%)
  3. Smith & Wesson27 (5.3%)
  4. Daniel Defense16 (3.1%)
  5. Bushmaster12 (2.4%)
  6. FN9 (1.8%)
  7. Heckler & Koch6 (1.2%)
  8. Bravo Company Manufacturing5 (1%)
  9. Rock River Arms5 (1%)
  10. Springfield Armory3 (0.6%)

Agencies issuing the Colt AR-15

Alameda County Sheriff's Office (CA) · Arcata Police Department (CA) · Atwater Police Department (CA) · Barstow Police Department (CA) · Bear Valley Police Department (CA) · Beaumont Police Department (CA) · Belmont Police Department (CA) · Blythe Police Department (CA) · Campbell Police Department (CA) · Carmel Police Department (CA) · Cathedral City Police Department (CA) · Chowchilla Police Department (CA) · Clayton Police Department (CA) · Clearlake Police Department (CA) · Cloverdale Police Department (CA) · Corona Police Department (CA) · Covina Police Department (CA) · Cypress Police Department (CA) · Dinuba Police Department (CA) · El Centro Police Department (CA) · Eureka Police Department (CA) · Exeter Police Department (CA) · Folsom Police Department (CA) · Gardena Police Department (CA) · Glendora Police Department (CA) · Grover Beach Police Department (CA) · Hemet Police Department (CA) · Hillsborough Police Department (CA) · Humboldt County Sheriff's Department (CA) · Inyo County Sheriff's Department (CA) · Kensington Police Department (CA) · Kerman Police Department (CA) · La Habra Police Department (CA) · Lodi Police Department (CA) · Los Alamitos Police Department (CA) · Mammoth Lakes Police Department (CA) · Marina Department of Public Safety (CA) · Marysville Police Department (CA) · Montebello Police Department (CA) · Newark Police Department (CA) · Placentia Police Department (CA) · Pomona Police Department (CA) · Port Hueneme Police Department (CA) · Rohnert Park Department of Public Safety (CA) · San Ramon Police Department (CA) · Sand City Police Department (CA) · Santa Barbara County Sheriff's Office (CA) · Santa Clara County Sheriff's Office (CA) · Santa Clara Police Department (CA) · Sausalito Police Department (CA) · Seal Beach Police Department (CA) · Seaside Police Department (CA) · Selma Police Department (California) (CA) · Sonora Police Department (CA) · Suisun City Police Department (CA) · Taft Police Department (CA) · Tracy Police Department (CA) · Turlock Police Department (CA) · Tustin Police Department (CA) · Union City Police Department (CA) · Walnut Creek Police Department (CA) · Whittier Police Department (CA) · Yolo County Sheriff's Department (CA) · Twin Falls Police Department (ID) · Quincy Police Department (Illinois) (IL) · Lebanon Police Department (Indiana) (IN) · Topeka Police Department (KS) · St. Michaels Police Department (MD) · Berkeley Police Department (Missouri) (MO) · Tompkins County Sheriff's Office (NY) · Ashland Police Department (Oregon) (OR) · Weber County Sheriff's Office (UT) · West Jordan Police Department (UT) · Madison County Sheriff's Office (Virginia) (VA) · Marysville Police Department (Washington) (WA)