Re: What's wrong with CMMG??
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Nostradumbass</div><div class="ubbcode-body">Anybody have negative issues with this manufacturer</div></div>
Yes. I ordered an M4 upper from them way back in the day. The barrel was loose and resulted in extremely poor groups. Not knowing this, I attended Front Sight class and almost failed because I couldn't hit anything. Instructor also tried my rifle and couldn't hit anything either.
I finally discovered the barrel was loose and tightened it up quite a bit. It shoots a lot better now, but still not great. I may have damaged the barrel or bolt by shooting a thousand rounds or so with a loose barrel, or maybe it's just a cheap barrel and I shouldn't have high expectations to begin with.
About a year later the rifle started short-stroking. I discovered that the gas key was not staked properly, if you could call it staked at all. It looked as if someone simply placed a chisel across the top of each gas key bolt and hit it once with a hammer. I have also seen other gas keys staked like this from other manufacturers, so it appears to be a common problem and perhaps CMMG was just using a parts source that others use as well. In any case, I have since staked it properly and it has been reliable thereafter.
This was all about 7-8 years ago. Enough people seem happy with them now, perhaps they have improved. I will say that in my one experience buying from them, their communication was quick and knowledgeable, including both pre-sale and after-sale support.
