Installation Difficulty Level: The KAC Knight's Armament Front Sight Gas Block requires the barrel and the gas block to be milled in order for the taper pins to be installed. N.S. Defense recommends having a competent Armorer install this product.
Product Description: The KAC Knight's Armament Front Sight Gas Block fits any AR-15, M16, SR-16, or SR-15 with a 0.750" barrel diameter. The front sight folds
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