Griffin Armament PSD AR-15 Pistol Complete Upper Receiver 300 AAC Blackout 9.5" Barrel

Griffin Armament's MK1 Upper offers premium features and reliability to each user and allows end users to configure their upper to fit their needs. The Griffin HEDP Barrels provide High Endurance Dual Purpose functionality- offering high durability and precision accuracy. Nitride 416R stainless steel provides the highest possible hardness and longest throat life available with match grade bore dimensions and bore finish. HEDP barrel bores are hand lapped, ensuring batch to batch consistency and accuracy. TRUE-BORE concentric suppressor grade threads provide an optimized thread interface for your silencer regardless of brand or model. M4 feed ramps and chambers are polished prior to nitriding for smooth reliable feeding, chambering, and extraction. M4A1 contour diameter between the chamber and gas block for minimal POI shift with suppressors and maximum accuracy and durability while maintaining field weight.Griffin Low-Pro RIGID rails are a slim, low profile, ultralight, yet rigid M-...