Home CMMG CMMG MK57 22LR Conversion

CMMG MK57 22LR Conversion

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The 22LR conversion turn your 5.7 upper in to a caliber you can actually find and shoot at a reasonable price right now!

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13 COMMENTS

  1. I am worried about barrel leading on my 5.56 AR and the gas tube getting gunked up. I want to train with .22 for obvious reasons but cleaning a gas tube seems hard and I don't want to screw up my defense rifle. A dedicated upper is so expensive, especially if I need dedicated optics for it.

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