Aero Precision AR15 Upper Receiver comes fully assembled with the port door and forward assist. In addition the receiver has been squared up on a lathe by Blackstone Arms. This step assures that the face between the receiver and barrel extension is square. Forged from 7075-T6 aluminum, this assembled upper is precision machined to mil- spec M16/M4 specifications and features M4 feedramps
ARP's quietest comp and offers great flash reduction while keeping the muzzle down for a quick follow up shot. Closed end to keep from snagging on brush. Fits 6.8 caliber and smaller with 5/8-24 muzzle threads
Toolcraft M16 bolt carrier kit. Salt Bath Nitride/Melonite exterior and chrome lined inside carrier. Machined and Staked to USGI specifications.