The FN 15 Patrol Carbine is FN's law enforcement duty rifle with a 16-inch chrome-lined barrel, M4 handguard, and collapsible stock. Built to the same military specifications as FN's contract M4s. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2015, USA Weight: 100.8 oz Overall length: 32.75" Status: Active Intended use: Law Enforcement, Duty, Tactical