Build your next AR with the Noveske N4 Gen 4 Receiver Set. Upper FeaturesNoveske 4th Generation precision machined billet receiver from 7075-T6 aluminum w/extended feed rampsPicatinny mil-standard 1913 top rail with Noveske CrossHardcoat type III anodizingFeaturing anti-rotation interface with handguardReceiver designed to match the profile of Noveske 4th Generation handguardsIncludes port doorIncludes Noveske marked forward assist Lower FeaturesNoveske 4th Generation precision machined billet receiver from 7075-T6 aluminumOversized flared magazine wellImproved ergonomic integrated oversized trigger guardAmbidextrous bolt releaseAmbidextrous magazine release with improved fencingHardcoat type III anodizingAdjustable tension screw for perfect fit between upper and lowerIncludes ambidextrous bolt release and magazine catch hardwareIncludes Noveske marked pivot and take down pins with the appropriate detents and springs