Complete, ready-to-install, semi-auto receivers let you change your AR-15 from a sporter to a match rifle or long-range varminter in just minutes—or add to a lower receiver to complete a parts gun. All barrels have six-groove, 1-9" right-hand twist rifling and M4-type feed ramp. Pre-ban style standard (Std) barrels are chambered for 5.56mm NATO, with A2 flash suppressor, military-style polymer handguard, and A2 front sight housing that includes bayonet lug and riveted sling loop. Most models available with standard manganese-phosphate Parkerized bolt or Chrome-plated bolt for additional lubricity and wear resistance.
SPECS:
Receiver - aluminum, anodized and Teflon® coated, black. A2 carry handle with adjustable rear sight. Barrel - Std - 4140 steel, Parkerized finish, dark gray. .725" dia. at muzzle. Barrels are not chrome lined; chrome-lined barrels available by special order only. "Chrome" designation refers to bolt and carrier being chrome plated.
Catalog page 3, 570