usadaytrader

I don't know. Did they change the design of the MK-3? I know Pmags work fine in Mk-3s. Anyways, other than the feeding problem, the buffer area on my lower is being gouged by the bolt carrier. I respect your feedback, but I feel that using only one type of mag is kind of a half ass fix.

Thanks man, but I am going to pass. The lower should be able to use at at a few brands of mags. I don't want an AR that only takes one brand of mags from a manufacturer that is out of business (I know its new ownership). It should at least use DPMS mags!

Yes, all mags lock open on empty mags. I sent the lower back to CMMG and all they did was remove more material from the magcatch area. But it still has the same feeding problems. No mags works. The lower is worthless. Minus well of bought a bolt action rifle. I am requesting a new lower replacement because I am spending too much time and money and ammo for this POS. A guns worthless if theres no available mags for it.

Thats probably what happened. My lower is old. I can't find any mags to use with it. Its pretty much a useless lower. Ya think they will exchange it for one with the same serial number? I bought it brand new. Not sure the dealer is still in business. I only have Pmags and DPMS mags. They only partially work. Doesn't do me any good. I hope they stand by their products.

I have the same bolt over problems with my CMMg and DPMS upper. Has anybody resolved this?