AERO PRECISION EPC-9 9X19 ATLAS S-ONE M-LOK® Complete Upper BLK 8.3″ Wechselsystem

Includes:– EPC-9 Upper Receiver – Included EPC-9 Direct Blowback BCG – Included Charging Handle Standard – Included A2 flash hider – 7.3″ ATLAS S-ONE Handguard – 8.3″ 9mm CMV BarrelEPC-9 Upper Receiver 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 takedown/pivot pin lug pattern – Machined from custom forged 7075-T6 aluminumATLAS S-ONE Handguard Features:– Front and rear picatinny rail – Eliminated center of top rail for weight reduction – Indexing grooves in 12:00 position for positive grip control – Quick disconnect sling socket at the 3, 6 and 9 o’clock positions – 1.3″ Inside diameter – 1.5″ Outside diameter8.3″ 9mm Barrel Features:– Chamber: 9×19 – Length: 8.3″ – Twist: 1 in 10 – Threading: 1/2″x28 – Material: Chrome Moly Vanadium – Finish: QPQ corrosion resistant finish both inside and out