The FN 15 Patrol Carbine is a law enforcement-oriented AR-15 with a 16-inch barrel, collapsible stock, and flat-top upper. Optimized for patrol use with reliable mil-spec components and a mid-length gas system. Type: Semi-Auto Rifle Action: SA Caliber: 5.56 NATO Capacity: 30 Year introduced: 2015, Belgium Weight: 63 oz Overall length: 32" Status: Active Intended use: Law Enforcement, Tactical, Service