Action: Semi-Auto – Caliber: 5.56 NATO – Capacity: 30rd – Barrel: 18 (1:8) Stainless Steel with Armalite Tunable Brake – Receiver Upper: Aluminum Black – Receiver Lower: Aluminum Black – Stock: MBA-1 Adjustable Length-of-Pull & Comb Black – Grip: Black – Trigger: Timney 3 lb. Single-Stage – Length: 39.5-40.5 – Weight: 7.8 lbs. – The M153GN are Armalite’s flagship competition rifles that are built to win. This carbine is compact light and ultra-fast. The low profile handguard covers a free-floating 18-in. barrel with Armalite’s own tunable muzzle brake. An adjustable gas block also allows the rifle to be individually set for optimal performance. – Included with Rifle: (1) 30rd Magpul PMAG