The Stag 15 M4 Rifle is the high quality durable military proven M4 design rifle you've been looking for. Made to mil-spec standards this rifle satisfies the need for a standard GI carbine. - The Stag 15 M4 features a 5.56x45mm NATO chamber 16 1/7 chrome lined barrel with a thermoplastic handguard a Magpul MOE trigger guard a six position buttstock A2 birdcage flash hider and a mil-spec manganese phosphate coated M16 BCG. - Every complete AR15 rifle from Stag Arms comes with a Transferable Lifetime Warranty an Infinite Shot Barrel Guarantee and a magazine. - Weight: 6.75 lbs - Length: 32.25 collapsed 35.5 extended - Action: Semi-Auto Direct Impingement - Caliber: 5.56 NATO/.223 - Twist Rate: 1/7 Button Rifled - Muzzle Device: A2 Flash Hider - Barrel: 16 4150 Steel Chrome Lined Government Profile Manganese Phosphate Coated - Handguard: Thermoplastic with Double Heat Shields - Receiver Material: Forged and Mil-Spec 7075 T6 Aluminum with Type 3 Hard Coat Anodizing - Bolt Carrier: Mil-Spec Manganese Phosphate coated M16 BCG - Gas System: Carbine Length with A2 Front Post - Charging Handle: Standard Mil-Spec - Front Sight: F-marked A2 Front Sight and Bayonet Lug - Rear Sight: Removable A3 Carry Handle with Integrated Sight - Buttstock: Mil-Spec 6 Position - Buffer: Heavy Buffer and Spring - Trigger: Mil-Spec Single Stage Trigger w/ MOE Trigger Guard - Grip: A2 Style Plastic Grip - Magazine: 30rd - Safety Selector: Right Hand