Current US military standard carbine. 14.5-inch barrel, collapsible stock, M203 capable. The most issued US military rifle since Vietnam-era M16. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 1994, USA Weight: 6.43 oz Overall length: 29.75" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Tactical