Aero EPC-9 9/40 Threaded Assembled Upper Receiver w/LRBHO - Anodized Black

The EPC-9 upper receiver is the perfect addition to any AR9 build. Including a last round bolt hold open mechanism and compatible with most standard AR15 barrel nut and handguard combinations this upper receiver will help take your pistol caliber build to the next level.FEATURES:Last round bolt hold open mechanismAccepts most AR15 compatible barrel nuts and handguardsDimple above threads to allow for proper handguard timingStandard AR15 takedown/pivot pin lug patternMachined from custom forged 7075-T6 aluminumLaser engraved T-marksINCLUDES:Upper ReceiverPre-installed last round bolt hold open assembly