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ProGun2nd's Review of CMMG 22LR Mk4 Barrel Kits w/ Collar
Used it to build a 22 dedicated AR. I already had the Cmmg 22 conversion kit for a 5.56. Had no issues using it with this barrel. I have cycled about 500 round through it without any feed issues. Had a few rounds that didn’t fire but had a good primer strike. I blame that on the cheap box ammo.
Would Recommend:
Yes
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