Mil-Spec Forged 7075-T6 Lower Receiver Type III Class II Hard-coat anodized finish beveled magwell machined chevrons in front strap - Forged 7075-T6 Upper Receiver Type III Class II Hard-coat anodized finish 1913 Picatinny rail flat top with dry lube internal finish and laser engraved T-markings - Chambered 5.56x45 - 7.5 Melonited Barrel - Ergonomic Free-Float M-LOK Rail - Standard Trigger - Angled Grip - Tactical Stock with QD Mounts - New Low Profile Gas Block - Extended A2 Flash Hider - Ambidextrous Safety & Charging Handle - Includes Front & Rear Flip Sights - THE PISTON SYSTEM - A Short Stroke Free Floating Piston System. - Is Self-Cleaning. - Carbon and gases are expelled forward away from operator. - Corrosive resistant coating processes. - Harmonics are not transferred into the barrel. - Adjustable gas settings for various applications. - Doesn't vent directly to atmospheric pressure; this eliminates flash signature and super sonic crack which is optimal for night vision and suppresses fire.