Colt 5.56mm IAR Upper Receiver Assembly | 11.5" Barrel

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The Colt IAR6933CK Complete Upper Receiver Assembly is used on the short barrel IAR variant, built at the request of FBI HRT. This monolithic upper receiver features an uninterrupted full-length top rail, allowing for a free-floated barrel with a gas-block mounted fixed front sight post, a heat sink, and a backup rear sight. The barrel is Colt's heavy 11.5" chrome lined IAR barrel with an A2 flash hider up front. Suggested to be used in conjunction with an H2 or H3 buffer.