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Posted: 11/1/2009 10:40:16 AM EST
I am looking to start a 9mm AR build. The only necessary requirement I have for an upper is for it to be threaded 1/2x28 at the muzzle so I can attact a AAC suppressor. What are the available uppers out there. I found that Spikes tactical has them but was wondering if there were others.
Link Posted: 11/1/2009 12:24:31 PM EST
9mm barrels usually are specifically NOT threaded 1/2x28 due to the dangers of attaching a standard muzzle device sized for 5.56/.223. Usually they are custom or specialty products.
Link Posted: 11/1/2009 12:50:24 PM EST
you can get 1/2x28 9mm uppers from oly i know several people that have them
Link Posted: 11/1/2009 2:11:31 PM EST
My spikes 9mm barrel was threaded 1/2 x 28
Link Posted: 11/1/2009 4:08:46 PM EST
The oly is 5/8x24 standard but 1/2x28 on request. Since you mentioned the can you should also know the oly is 1:16 twist barrel while the colt style is 1:10.
Link Posted: 11/1/2009 4:37:12 PM EST
Got mine from Spikes 1/2 x 28
Link Posted: 11/1/2009 8:25:06 PM EST
2 of my Spikes are threaded 1/2x28 and the Noveske is 1/2x28
Link Posted: 11/1/2009 9:03:17 PM EST
I got a bbl from Adco that is 1/2x28.
Link Posted: 11/1/2009 11:40:25 PM EST
Originally Posted By okcscott:
Got mine from Spikes 1/2 x 28

Link Posted: 11/2/2009 2:38:48 AM EST
RRA and Colt barrels are 1/2 X 36. Just in case you were looking at them. I'm sure any machine shop could rethread to your pattern but you would lose a bit of barrel length.
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