Upper Half, Modular, 10.25", A3

AR15 / M16 A3 Upper, with 10.25" i Heavy barrel, A3 Upper receiver and Modular handguard. Item # AR-UH10Mod. This 5.56mm caliber barrel is 10.25" long, threaded the standard 1/2 x 28 tpi, and has an A2 flash hider with the correct crush washer. The barrel is machined from chrome-moly, high vanadium steel and hardened to a U.S. government Mil-spec of Rc 26-32. The barrel, and all external steel parts, are manganese phosphate finished IAW 5.3.1.2 of Mil-STD-171, the U. S. government's recommended protective finish for steel. This finish not only looks great, it affords complete corrosion protection. These barrels are of heavy-weight (.950 diameter under the handguards, .750 under the front sight base) dimension their full length which alleviates barrel whip and enhances accuracy in semi auto fire and helps dissipate heat. The barrel is button rifled with 6 grooves, right hand, 1 / 9" twist. The 1/9” twist is best because it handles the widest variety of ammunition and bullet weights. The barrel is mounted on a FORGED A3 upper receiver with built in Mil-spec M1913 Picatinny accessory rail, with the correct rail numbers engraved, made from certified forgings, hardcoat anodized IAW Mil Spec A8625, Type III, Class II, black per No. 37038, Table IX with nickel acetate seal, as per the Mil-spec. The upper features a forward assist and hinged ejection port cover. This kit features a 7” long modular handguard with 4 M1913 spec Picatinny rails. This handguard is machined from aircraft aluminum and hardcoat anodized IAW Mil Spec A8625, Type III, Class II, black per No. 37038, Table IX with nickel acetate seal, as per the Mil-spec. The handguard is massively slotted for efficient cooling can be “timed” to any rotational position and then locked. The standard carbine AR gas system is located under this handguard. A 4 position gas block with M1913 Picatinny rails is standard. The upper is fully assembled. Drop in your bolt/carrier and charging handle, check headspace and let her rip! You can get this upper with a CHROME LINED chamber and barre, just add the item # AR-CHROME to your order.