R16SLSFSM MODEL SPECIFICATIONS USA Caliber: .223 Remington/5.56 NATO Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel with M4 Feed Ramps Action: Semi-Automatic, Gas Impingement System Rifling: 1 in 9" - Right Hand Twist Capacity: 30 + 1 - Ships with one 30 Round Magazine Stock: Mission First Tactical Minimalist Buttstock with Mil-Spec Buffer Tube Safety: Manual Lever with Indicator Markings on Both Sides of Receiver Forend: Windham Weaponry 13" Free-Floating Railed Handguard Receiver: Flat Top Type Upper Receiver Pistol Grip: Mission First Tactical Engage Pistol Grip Receiver Material: Forged 7075 T6 Aircraft Aluminum with Aluminum Trigger Guard Rear Sight: Kriss Polymer Rear Flip Sight Receiver Finish: Hardcoat Black Anodize Finish Front Sight: Kriss Polymer Front Flip Sight Trigger: Standard Mil-Spec Trigger Weight: 6 lbs. without magazine Bolt Material: Machined from Mag Par...