I have an 11.5 inch SBR I recently put together that I am having gassing problems with.

I am using an 11.5 inch Noveske barrel, H2 buffer and the only extra BCG I had laying around...an LMT Enhanced Bolt Carrier with their Enhanced bolt as well.

The gun runs fine either suppressed or non suppressed except it will not lock back on the last round.

I pulled a Young NM BCG out of another rifle and it works fine.

I swap the bolt out of the LMT Enhanced carrier with a standard bolt (in place of the LMT Enhanced bolt) and it runs fine.

So obviously the bolt is the problem. Its my understanding that the LMT Enhanced bolt was meant to run with a 14.5 inch barrel anyways.

So here is my question, the BCG is one that I had pulled from a 14.5 Noveske that I sold. I had around 500 rounds fired through it at the time. I have a brand new MPI tested bolt that I bought from BCM that I tried in the LMT carrier that runs fine.

Is there a problem throwing a new bolt in the mix now and with that carrier? It doesnt seem like 500 rounds would be enough to create any wear patterns that would cause excessive wear problems with a new bolt.....but I figured I would check opinions here before i went out and ran it hard with the new bolt.


Or would I be better off just buying a new standard BCG?

I was just trying to save a few bucks and use parts I already have but if I need to Ill just scrap the idea and buy a new bolt.