Quote Originally Posted by Wimb0 View Post
Sorry, I should have been more specific. It’s a 16inch carbine length has system, Ive moved to a low profile gas block rather than the A2. I’d like to keep the gas system carbine but no A2 as my rail doesn’t support that. I’ve heard good things about faxon too.
Looking at GM there are a couple that fit your desires - maybe take a look at this one:

http://www.gmriflebarrel.com/gm-m6-f...l-w-extension/

They also have several M4 profile barrels.