Barrel Length- 16” Lightweight Contour Gas block- Lo-Pro, .750, pinned to barrel Barrel extension w/extended feed ramps Upper Receiver Model- Gen I Flat-top receiver w/extended feed ramps Finish- Hardcoat Anodizing, type III Charging Handle- MOD 4 Gun Fighter Shot peened & MP tested bolt Auto carrier w/staked carrier key Lower Receiver Model- Gen I forged receiver Finish- Hardcoat anodizing, type III Trigger- ALG Defense ACT Extension- Mil-spec 6 position receiver extension Staked Noveske QD End Plate Handguard NSR-13.5” Free Floating Handguard Furniture Stock- Magpul CTR Grip- Magpul MOE 5.56mm CHF Mid 1/7" H Manganese Phosphate LW 1/2-28 A2