Aero precision ar15 assembled upper receiver anodized black Other Features: Forged 7075-t6 aluminum machined to mil-spec m16/m4 m4 feedramps laser engraved t-marks made in america port door...
Guntec ar9 stripped billet upper receiver black FEATURES:-9mm Luger-Smooth Slab Side Design-Flat Top 1913 Picatinny Rail-6061 T6 Billet Aluminum Other Features: Manufactured from a solid block of...