There is also Civillian and Police models of M-16 Army Rifles "available" in "Semi-Automatic" called an "AR-15" with a 30 rounds Clip..
Old School Cops used carry a 38 or 357 Revolver on their belt hadda 12 guage Remington Shot-Gun in the trunk or bolted 2 the dash in a holder..
By the 1980s/1990s the Cops and Sherriffs Department found themselves "Out-Gunned" by thugs and dope dealers with Fully "Automatic" guns..
Today standard issue is a 9mm Glock with 18 Rounds clip..
Squad Car Fire-Power is the "AR-15" 30 rounds clip
This here is the "Modern" Law Enforcement issue AR/15 or M-16
IM Sorry that guy "Customized" his with after-market parts but still gives ya a basic Idea as a Squad Weapon and Fire-power he also keeps going back Your "Agency" Issued welp I can tell ya this back in the day ya got "Standard" Issue not all "Modified" like Today and ya "Trained" on Range learned "Standard Issue" become somewhat "Proficient" on that
https://youtu.be/EL6dZaKIWFM?si=8Im1oC4oIuIyzDwY