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This is a Rock River Arms 6.8 SPC CAR-A4 Complete AR-15 Upper Receiver. These 6.8 uppers from Rock River are an excellent entry level option if you currently have an AR-15 and want to have an additional caliber available to you without buying a new rifle. These uppers are equipped with a 16" heavy profile barrel tipped with a standard A2 muzzle brake. The top of the receiver is railed and T-marked for mounting optics or detachable iron sights for use with the equipped A2 front sight tower. The forend is a set of standard AR-15 vented and heat-shielded plastic handguards. These uppers also come with a complete bolt and bolt carrier assembly, as well as a charging handle, ejection port cover and brass deflector. The chambers are SPEC-II for increased safety and reliablity. These receivers are well-manufactured and are an excellent value. Requires 6.8 SPC magazines.
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