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Can I swap out my M&P 15 16” 5.56/.223 barrel for this 16” .300 ACC barrel? — 1 Answer

by TX Roadrunner, from TX, United States Asked on January 30, 2022

Name CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly (4.7)
As Low As $173.49 Save Up to 14%
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Answered by Hunter, Gear Expert, from OH, United States, on February 11, 2022

Yes, theoretically you could use the CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly in a Smith and Wesson M&P 15. I recommend you take your rifle to a gunsmith to ensure its done properly, if you choose to swap out barrels.

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Last updated 2025-11-12 UTC.