Aero Precision APAR620201AC EPC9 Threaded Receiver 9mm Luger 7075T6 Black Anodized Aluminum for ARPlatform

The EPC9 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 mechanism Accepts most AR15 compatible barrel nuts and handguards Dimple above threads to allow for proper handguard timing Standard AR15 takedownpivot pin lug pattern Machined from custom forged 7075T6 aluminum Laser engraved Tmarks. Includes: Upper Receiver PreInstalled last round bold hold open assembly.