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From RugerÂ®, a stripped lower receiver for AR-556. The 7075-T6 aluminum lower receiver is finished in a black finish, ready for your next AR build. For 5.56 mm NATO and .223 Remington.
Sub-caliber upper assemblies allow fast and simple conversion of ARs chambered in .223 to 9mm Luger. True, dedicated, complete upper receivers are assembled from military specification components; includes a Wilson, 1-10 twist barrel, bolt and carrier, charging handle, shell deflector, heat-shield lined handguards, sling swivel, and A1-style flash hider. Additional items not included but required for conversion to 9mm are a 9mm magazine (739-000-014); magazine adapter, action spring, and recoil buffer (080-000-442). A2 configuration has A2 adjustable sights regulated for 9mm.
SPECS: Barrel - 4140 steel, blue, matte finish, 16â (40.6cm) long, .725â (18cm) O.D. Receiver - Aluminum, anodized finish, matte black. Designed to fit lower receiver with .25â (6.3mm) diameter takedown pins.