The Tapco gas block is a .750-inch inside diameter piece designed for AR-pattern rifles, used to direct gas from the barrel into the gas tube so the rifle can cycle. Matching the diameter to your barrel's gas journal is important, and .750 is a common size for many barrel profiles. Tapco has long offered affordable parts and accessories for AK and AR builders. This is a straightforward replacement or build component that gets the job done for anyone assembling or repairing a rifle. Confirm your barrel's gas journal size before installing.

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