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Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
Posted: 7/30/2014 4:58:51 AM EDT
I'm considering buying a CMMG complete 9mm AR lower. Can I put a standard AR pistol buffer tube on that to be used with a sig pistol brace or are the dimensions different on a 9mm?
Link Posted: 7/30/2014 4:59:44 AM EDT
[#1]
Same threads as a standard AR receiver...
Link Posted: 7/30/2014 5:02:22 AM EDT
[#2]
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Quoted:
Same threads as a standard AR receiver...
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This.  All the same.
Link Posted: 7/30/2014 5:05:42 AM EDT
[#3]
I was thinking more along the lines of the length of the spring/travel of the BCG.

Glad to know it'll work, thanks for the help.
Link Posted: 7/30/2014 5:51:21 PM EDT
[#4]
The buffer tube will fit and you might be able to use a carbine length spring but you will need a heavier buffer.  Depending on your spring/buffer combo you might want to use some kind of spacer the limit the BCG travel so it doesn't slam into the bolt catch and break it.
Link Posted: 7/30/2014 6:08:34 PM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
The buffer tube will fit and you might be able to use a carbine length spring but you will need a heavier buffer.  Depending on your spring/buffer combo you might want to use some kind of spacer the limit the BCG travel so it doesn't slam into the bolt catch and break it.
View Quote



This.

I'm using a Spikes ST-9X buffer which is around ~1" longer/8.5oz and a stock carbine spring and it works perfect in my SBR.
Page AR-15 » Rimfire and Pistol Calibers
AR Sponsor: bravocompany
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