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Code: 3KL-ATB-919B-QC-BRL-9-5-5
MPN: QC-BRL-9-5.5
These 9mm barrels from Quarter Circle 10 are constructed from 4150 CMV steel for maximum ruggedness. The thread pitch of these 9mm barrels is 1/2x28 which can mount on most auto-loading pistol magazines making these barrels a must have for any 9mm auto-loader build. Every Quarter Circle 10 9mm Barrel is tested individually for internal and external durability, headspace, and concentricity to ensure the best possible reliability and performance. Every Quarter Circle 10 9mm Luger Barrel is engineered specifically for pistol caliber ammo, not modified from an existing platform, increasing functionality, reliability, and overall performance. Every quarter-end of the Quarter Circle 10 9mm Luger Barrels is measured from the end of the muzzle to the end of the breech/feed ramp. Approximately 1 of the barrel rests inside the upper receiver upon installation, resulting in an installed length of 1 less than the listed overall length.