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will it work on 300 black set up — 1 Answer

by Bama, from AL, United States Asked on March 27, 2022

Name CMMG, Inc 22LR AR Conversion Kit, Mk57, w/ 3 Magazines, 10rd (5)
$239.95 $209.99 Save 12%
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Answered by Hunter, Gear Expert, from OH, United States, on April 05, 2022

This CMMG, Inc 22LR AR Conversion Kit, is designed for the CMMG Mk57 5.7x28mm upper receiver groups. So it will not work with a 300 Blackout upper.

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Last updated 2025-11-12 UTC.