Aero Precision EPC-9 Threaded 11" Railed Upper 9mm 1:10 no BCG&CH, Black

The EPC-9 complete upper receiver is equipped with the ATLAS R-ONE handguard engineered to prioritize compactness and lightweight characteristics. Despite its streamlined design, it offers ample space for various attachments to meet user requirements. The proprietary ATLAS attachment system delivers a robust and reliable mounting platform, ensuring a slim profile without compromising the strength and stability that Aero Precision handguards are renowned for. Upper receiver with last round bolt hold open mechanism The upper receiver is designed to be compatible with the majority of AR-15 barrel nuts and handguards Incorporate a dimple above the threads to ensure accurate timing of the handguard on the upper receiver Upper receiver with standard AR-15 takedown/pivot pin lug configuration The upper receiver is precision-engineered from custom-forged 7075-T6 aluminum Comprehensive top picatinny rail designed for optional accessory attachments on the handguard The handguard is equipped with quick disconnect sling sockets located at the 3, 6 and 9 o'clock positions Handguard with an internal diameter of 1.3 inches and an external diameter of 1-1/2 inches Compatible with military specification (mil-spec) AR-15 upper receivers and barrels Twist rate is 1:10 1/2-28 unified national fine (UNF) thread The barrel is constructed from chrome moly vanadium steel and features a QPQ corrosion-resistant finish applied to both the interior and exterior surfaces