Aero Precision Stripped M4E1 Threaded Upper for AR-15 - Black (Color: Black)

Billet Looks with All Forged 7075-T6 Construction The Aero Precision M4E1 threaded upper receiver brings all the reliability and parts compatibility of a classic forged upper, with the looks of an angular billet upper. This stripped upper receiver is completely customizable with your choice of forward assist and dust cover, as well as any bolt [...]