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Bolt Carrier Gas Key for AR15 / M16

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The Bolt Carrier Gas Key fits over the end of the Gas Tube within the Upper, and receives the pressurized gases necessary to cycle the rifle’s action. For those serious “do-it-your-selfers”, this high quality, machined steel Gas Key with black phosphate finish is ready to screw onto the Carrier. It is Chrome Lined inside for long life and easy maintenance. Note that for safe and reliable rifle operation, its screws must be “staked” to prevent them from becoming loose.


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