Caliber: .223 Rem. / 5.56mm NATO - Type: Pistol - Action: Semi-Automatic Gas Impingement System - Capacity: 30 + 1 Ships with one 30 Round Magazine (accepts all std. sizes) - Safety: Manual Lever with Indicator Markings on Both Sides of Receiver - Receiver: Flat Top Upper Receiver - Receiver Forged 7075 T6 Aircraft Aluminum with Aluminum Trigger Guard - Receiver Hardcoat Black Anodize Finish - Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel - Barrel: 11.5 Heavy Profile Chrome Lined with A2 Flash Suppressor - Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel w. M4 Feed Ramps - Rifling: 1 Turn in 7 Right Hand Twist - Receiver Tube: 5-Position SBA3 Stabilizing Arm Brace incl. Q.D. Endplate and Q.D. sling swivel - Forend: Midwest Industries 10.5 MLOK Free Float w. 2 Rail Segment - Pistol Grip: Pistol Grip: Hogue Beavertail Pistol Grip - Rear Sight: None: Mil Std 1913 Rail Ready for Accessory Sights/Optics - Front Sight: None: Mil Std 1913 Rail Ready for Accessory Front Sights - Packaging: Hard Plastic Gun Case with Operators Manual