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GBA Gas Block Aligner (SKU: T1511)GBA Gas Block Aligner (SKU: T1511)The Gas Block Aligner ensures perfect alignment between the gas port hole in your AR15 barrel and gas block. Works with any standard 3/4″ inner diameter gas block and barrel combination, regardless of manufacturer. The Gas Block Aligner is available in both .22 caliber and .30 caliber.
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