Anyone ever heard of these recievers? Was planning on adding one of there A2 uppers to my A1 colt sporter but it's listed with m4 feed ramps? Will it work with my full size Colt? Any info will be appreciated.
Posted: 3/22/2009 5:13:28 AM EDT
[#1]
If the receiver has M4 ramps, then you need to have them on the barrel extension as well.
Posted: 3/22/2009 5:18:31 AM EDT
[#2]
There was just a post last night about CMMG uppers but I cant seem to find it now..
sorry
Posted: 3/22/2009 7:11:44 AM EDT
[#3]
What is a barrel extension?
Posted: 3/22/2009 8:59:35 AM EDT
[#4]
Quoted: What is a barrel extension?
The barrel extension is that part that screws onto the rear of the barrel. The bolt locks into it.
barrel extensions with feed ramps
