Thread pitch on RRA 9mm barrel

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[ARCHIVED THREAD] - Thread pitch on RRA 9mm barrel

Posted: 2/12/2007 11:22:31 AM EDT

Can someone tell me the thread pitch on the factory RRA 9mm carbines? The FAQ above states that they are 1/2x36 instead of 1/2x28, but the post I read it in was from 2003. Is this still true? If so, is there a reason why? I want to run a suppressor on whatever I buy, and my cans are all 1/2x28. Any solutions to changing to 1/2x28 (if they aren't threaded that way)?

Posted: 2/12/2007 11:32:34 AM EDT

[#1]

Should still be 1/2" x 36.....that is the 9mm standard. I have one from a year or 2 ago and it is the same..........1/2" x 36.

Posted: 2/12/2007 12:04:56 PM EDT

[#2]

they're 1/2x36- either have it cut down and rethreaded, or get an adapter from trosusa.com

Posted: 2/13/2007 6:13:59 AM EDT

[#3]

Quoted:
Is this still true? If so, is there a reason why?

It's mainly so people can't screw on a 5.56 flash suppressor and watch the fun as a 9mm bullet tries to make it through the 5.56 hole.

Posted: 2/13/2007 8:34:23 AM EDT

[#4]

Quoted:
Can someone tell me the thread pitch on the factory RRA 9mm carbines? The FAQ above states that they are 1/2x36 instead of 1/2x28, but the post I read it in was from 2003. Is this still true? If so, is there a reason why? I want to run a suppressor on whatever I buy, and my cans are all 1/2x28. Any solutions to changing to 1/2x28 (if they aren't threaded that way)?

The best solution is to SBR the lower.
You know you want to anyways...

Then you can send me the barrel to shorten back to any length and put 1/2"-28 threads or even something bigger on it for you.

Shop Services link

This is a cross-section of 1/2-36 threads:

Posted: 2/13/2007 6:06:27 PM EDT

[#5]

Quoted:

The best solution is to SBR the lower.
You know you want to anyways...

Yes, that would be nice. Unfortunately, I'd go to jail for a long time. SBRs aren't legal in AL.

[ARCHIVED THREAD] - Thread pitch on RRA 9mm barrel

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