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If buying for subs, you will struggle - CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly

by Al, Verified Owner from AL, United States Written on July 19, 2023
Review for CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly
CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly
CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly
As Low As $175.89 Save Up to 14%
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Al's Review of CMMG, Inc .300 AAC Blackout Barrel Sub-Assembly

I purchased this barrel strictly for a 300 sub build. I know the optimal length is shorter, but I wanted to build a 16 inch sub build. Even with an adjustable gas block, I have yet to cycle rounds. It will run supers pretty well if you dial in the gas, but no luck so far with subs. Have tried a number of Hornady subs, the Stealth rounds and the Winchesters. Good luck out there.
Pros:
  • runs supers no problem
Cons:
  • no cycling of subs
Would Recommend: No
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