.750 Gas Blocks for AR-15 Barrels
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A .750-inch gas block fits the most common AR-15 barrels: government, M4 and medium profiles. These gas blocks all have a .750 bore, in low-profile, adjustable, clamp-on and pinned designs. Check your barrel's gas block journal before you buy: the block must match it exactly, and pencil or heavy barrels use other sizes.
Compare .750 gas blocks from every store we track, and see our gas block size guide if you're not sure.
