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Here's the ideal building block for your next suppressed/subsonic .300 AAC Blackout AR pistol build. The CBC® 300 BLK Upper features a 7.5" 4150 steel nitrided barrel with a 1:8" twist that provides optimal stability for the heavier projectiles found in subsonic loads. The 7" KeyMod Gen2 handguard is low-profile and free-floating, and allows for easy attachment of lights, lasers, and more.
PLEASE NOTE: Bolt carrier group and charging handle not included.