Duty Arms Index
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Colt AR-15 vs Smith & Wesson M&P15

Which U.S. law enforcement agencies issue each, by state. Colt AR-15 appears at more agencies in the index (75 vs 25). 2 agencies list both (for example as primary and backup or authorized options).

Data coverage: Based on 510 agencies in the Duty Arms Index with a current, sourced rifle entry. Generations and optic-cut variants are combined per model family. 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.

Colt AR-15 (model photo)

Colt AR-15

5.56x45mm / .223

Agencies (any current entry)
75
As primary issue
61

14.7% of 510 agencies with a sourced entry in this category.

Colt AR-15 Sporter SP1 Carbine shown. Photo: M62, CC BY-SA 3.0, via Wikimedia Commons. Model photo, not the agency's own firearm.

Smith & Wesson M&P15 (model photo)

Smith & Wesson M&P15

5.56x45mm / .223

Agencies (any current entry)
25
As primary issue
18

4.9% of 510 agencies with a sourced entry in this category.

Photo: danphamcdp, CC BY-SA 2.0, via Wikimedia Commons. Model photo, not the agency's own firearm.

By state

StateColt AR-15Smith & Wesson M&P15
CaliforniaAlameda County Sheriff's Office, Arcata Police Department, Atwater Police Department, Barstow Police Department, Bear Valley Police Department, Beaumont Police Department, Belmont Police Department, Blythe Police Department, Campbell Police Department, Carmel Police Department, Cathedral City Police Department, Chowchilla Police Department, Clayton Police Department, Clearlake Police Department, Cloverdale Police Department, Corona Police Department, Covina Police Department, Cypress Police Department, Dinuba Police Department, El Centro Police Department, Eureka Police Department, Exeter Police Department, Folsom Police Department, Gardena Police Department, Glendora Police Department, Grover Beach Police Department, Hemet Police Department, Hillsborough Police Department, Humboldt County Sheriff's Department, Inyo County Sheriff's Department, Kensington Police Department, Kerman Police Department, La Habra Police Department, Lodi Police Department, Los Alamitos Police Department, Mammoth Lakes Police Department, Marina Department of Public Safety, Marysville Police Department, Montebello Police Department, Newark Police Department, Placentia Police Department, Pomona Police Department, Port Hueneme Police Department, Rohnert Park Department of Public Safety, San Ramon Police Department, Sand City Police Department, Santa Barbara County Sheriff's Office, Santa Clara County Sheriff's Office, Santa Clara Police Department, Sausalito Police Department, Seal Beach Police Department, Seaside Police Department, Selma Police Department (California), Sonora Police Department, Suisun City Police Department, Taft Police Department, Tracy Police Department, Turlock Police Department, Tustin Police Department, Union City Police Department, Walnut Creek Police Department, Whittier Police Department, Yolo County Sheriff's DepartmentChico Police Department, Chula Vista Police Department, Delano Police Department, Gustine Police Department, Madera County Sheriff's Department, Menifee Police Department, Orange County Sheriff's Department, Pacifica Police Department, Simi Valley Police Department, Tehachapi Police Department, Woodland Police Department
Delaware—Smyrna Police Department
IdahoTwin Falls Police DepartmentTwin Falls Police Department
IllinoisQuincy Police Department (Illinois)—
IndianaLebanon Police Department (Indiana)—
Iowa—Iowa State Patrol
KansasTopeka Police DepartmentGarden City Police Department (Kansas), Topeka Police Department
MarylandSt. Michaels Police Department—
Massachusetts—Melrose Police Department
Minnesota—Brooklyn Park Police Department, Hennepin County Sheriff's Office, Minnesota State Patrol
MissouriBerkeley Police Department (Missouri)—
New YorkTompkins County Sheriff's Office—
North Carolina—North Carolina State Highway Patrol
Oklahoma—Norman Police Department
OregonAshland Police Department (Oregon)—
UtahWeber County Sheriff's Office, West Jordan Police Department—
VirginiaMadison County Sheriff's Office (Virginia)Chesterfield County Police Department
WashingtonMarysville Police Department (Washington)Jefferson County Sheriff's Office (Washington)
Wisconsin—Marathon County Sheriff's Office

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