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Discussion Starter · #1 ·
I want to put a 14.5 midlength sabre defense barrel into my acr and have a AAC brakeout permently attached. Will the gas port need to be moddified? I also want the barrel trimmed back a little more since the brakeout is actually longer than 1.5". I want an OAL of 16". And flute the barrel to shave a little more weight.

Has anyone don't this? any known problems?
 

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If the barrel you want to use already has something permanently attached someone like Adco could get it off but it [the Blackout] would be destroyed in the process. The AR barrel's gas port is larger than what the ACR likes so you'd need to do some gas block work with installing a restrictor. Not impossible, but would require some extra work to get it to run right.

If you can, try getting a barrel without the gas port drilled (CMMG will sell their barrels sans port I know) and starting that way.
 

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Don't know anyone professionally doing the work, so to speak. bigdog on here did some work on his gas block when he did the 10.5" barrel. Might check with him.
 

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if you do the gas block you will have a bad day trying to get through the melonite and hardened steel, i fried several bits trying to do this-i had to buy some cobalt drill bits and a hardened steel tap to get the job done, if you need help let me know
 

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Be sure to post your progress on the project and some pics when you get it up and running!
 

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Discussion Starter · #8 ·
Will do. It will be a couple months. I'm not stateside at the moment. Just trying to gather information to do the chop or barrel conversion on my ACR.
 
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