Undergassed?
Before I start, I purchased the rifle in question long before I undertood the differences between makers. So any responses to this effect is unecessary. This carbine has been relegated to a loaner rifle and will not ever be used for SHTF or formal training.
Many years ago I purchased a mid-length carbine for a song. As it turns out there is a reason for the low price. It's a 14.5" CMMG with a permanenetly attached "long" Flash Hider on a Bushmaster Lower.
It short strokes when I shoot anything but "hot" ammo (ie: 5.56 pressure rounds). I've already checked the Gas Key and replaced the Gas Rings. I don't see any leaks around the pinned Gas Block.
What happens is even with crappy 55-grain Wolf WPA it cycles fine but will not lock back on the lasst round. I've tried different magazines with the same results. Like I said, hotter rounds do fine. I have also tried dfferent BCGs, buffer weights (upt to H3) and a new spring.
I was thinking of replacing the Gas Tube next. Any other suggestions? Thanks in advanced.
Last edited by CarlosDJackal; 08-14-12 at 15:42.
We must not believe the Evil One when he tells us that there is nothing we can do in the face of violence, injustice and sin. - Pope Francis I
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