The Armalite AR-10 Carbine with a 16-inch barrel is the compact version of the full-size AR-10, designed for law enforcement use where full rifle length is impractical. The M4-profile 16-inch barrel and collapsible stock provide handling characteristics similar to an M4 while chambering the more powerful 7.62x51mm NATO cartridge. A practical law enforcement precision patrol rifle. Type: Rifle Action: Semi-Automatic Caliber: 7.62x51mm NATO Capacity: 20 Year introduced: 1997, USA Weight: 120 oz Overall length: 36.5" Status: Active Intended use: Patrol Rifle / Law Enforcement, Patrol