jebarton3

I wish I had gotten pictures but after reading your reply it makes more sense. So it's not trying to load 2 live rounds the spent casing that should be ejected is just spinning around instead of ejecting out and causing it to jam. the part of the casing that is getting "chewed" up is the neck and mouth area. probably from the bolt coming forward.

Brand new 10 round pmags.

What is the other part of said system? I have a heavy buffer also so I can give that a try if I can get a chance to hit the range this weekend.

I am currently running a hydraulic buffer. you believe I should go with a heavy buffer?

So I had my 308 sbr out at the range after building it recently and at first I was having feeding issues. It would double feed rounds and I was tearing up brass. I adjusted the gas block so that the rifle would feed and after around 20 rounds the casings will now instead of ejecting they will just spin around in the upper causing it to chew up the brass and causing it to jam up. am I needing to adjust my gas block to where I need more or less gas? Or could it be something different? Thanks guys.

Thanks guys this is the finished product. Just waiting for this weather to clear up to go run it. Thanks for all the input!

This barrel was the only one I could find and even these are sold out on other sites.

It's temporary as the 12.5 barrels are sold out everywhere and have been for months.

Ok, I must have been tired when messing with it last night.

I can barely get it started. I'll try it out in the morning and report back. thanks guys.

Hopefully someone that knows will chime in. Thanks guys! Really looking to get this together and hit the range!

Hey guys, so I'm actually building my first 308 SBR and I seem to have run into a problem. I just got a CMMG 12.5 308 barrel in today and it doesn't seem to fit into my CMT upper. The CMT upper is a dpms pattern high profile and I was under the impression that the CMMG barrel would fit? Am I'm missing something here? Is this barrel an AR patterned barrel and not a dpms pattern? Or should the barrel fit? Thanks.