The Windham Weaponry SRC is a semi-automatic gas impingement system rifle. It features hardcoat black anodized finish forged 7075-T6 aircraft aluminum lower and M4A4 type flat top upper receivers 4150 chrome moly vanadium steel M4 profile 16 chrome-lined barrel with M4 feed ramps and A2 flash suppressor and a six-position telescoping buttstock. The SRC also offers an A2 black plastic pistol grip M4 double heat shield handguards Picatinny rail gas block aluminum trigger guard and manual lever safety. Details Action Semi Auto - Caliber .223 Rem 5.56 NATO - Capacity 30 - Finish TimberTec Camo - Stock Collapsible A2 Pistol Grip - Twist 19 - Overall Length 32.375-36.125 - Weight 6.3 lb.