CNC machined from 7075-T6 aircraft grade solid billet aluminum machined to industry leading tolerances; Mil-Spec Type 3 Hardcoat Anodize Black Finish; Hand prepped for a flawless surface finish; Picatinny top rail; Shell deflector; M4-style extended feed ramps for excellent reliability with a wide variety of calibers; Undersize bolt raceway for smoother chambering, improved feeding and enhanced recoil dynamics; Smooth side profile without forward assist for maximum accuracy potential; Good match with standard Mil-Spec forged lower receivers or Wilson BILLet-AR lower receivers and any standard AR barrel; Enhanced receiver will not accept some aftermarket bolt releases; Approximate weight, 9.2 oz.