An AR-9 bolt carrier group fits 9mm AR-style pistol-caliber carbines. It includes the carrier, bolt, firing pin, and extractor. This BCG works with blowback operation for reliable cycling. It pairs with AR-15 upper receivers and 9mm barrels. Builders also use it with 9mm magazines and AR-9 lower receivers. The AR-9 bolt carrier group delivers smooth chambering and extraction. Shooters choose it for home defense, competition, and recreational shooting.

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