Enhance your new build with the Aero Precision EPC-9 Threaded Upper Receiver Set with LRBHO. This EPC-9 receiver set features custom machining from forged 7075-T6 aluminum with an anodized black finish for durability. The upper receiver features a last-round bolt hold-open mechanism, standard AR-15 takedown and pivot pin lug pattern, dimple above the receiver threads, and is compatible with most AR-15 compatible barrel nuts and handguards. The lower receiver features a threaded bolt catch, threaded takedown pin detent and includes factory pre-installed proprietary components.
Note: The EPC last round bolt hold open is compatible ONLY with Glock pattern magazines.