User adjustable gas block for reliable suppressed shooting; Superfinished and DLC-coated bolt carrier group makes it easy to clean and operate in all conditions; Bolt carrier is equipped with a buffer for optimized cycling and improved recoil impulse; Bolt is designed with enhanced extractor geometry and dual ejectors for reliable cycling; 18 inches cold hammer forged proprietary steel chrome-lined barrel for a lifetime of accuracy and durability; Innovative 4-bolt connection system to ensure greater accuracy; Grip-N-Rip independently ambi charging handle with anti-gas features for a better shooting experience; Lower receiver - enhanced flared magazine well and rear receiver QD swivel attachment point, CNC machined of 7075 T6 aluminum, type III hard coat anodized; Upper receiver - CNC machined of 7075 T6 aluminum, type III hard coat anodized; Barrel - DD proprietary steel, cold hammer forged, 1:11 inches (7.62), 18 inches S2W profile, rifle length, chrome lined, Mil-Spec heavy phosphate coated