Brassjunkie

Here are some pics of the dpms and fulton bolt face. The dpms is the bolt only, the fulton is with the chrome carrier. The fulton bcg is better at picking the rounds up, but will still slide over if the mags are pulled back. If you push the mags forward they work fine. With that being said I think mag slop is the most contributing factor in the failure to feed issue. I'm gonna try a fulton mag next and see how that works.

I'll post some pics when I can get some to turn out right....still working on it bear with me.

I installed a Fulton Armory BCG and it works better that the DPMS because the bolt face lugs arn't beveled so much and it picks up the round more reliably However I noticed the mag slop does have an affect on both DPMS and Magpul mags if your holding the rifle by the magwell while firing. Shooting off a bipod it fed fine. I need to try another brand of mags to see if I can eliminate mag well slop. Also tried this on a SunDevil lower and had the same issues as the CMMG.....The problem is the bolt face and mag slop.

Well I'm a little late in jumping in on this post so here goes....CMMG lower with endine buffer, AP4 16" upper and Magpul mags. I get bolt overrun with the Magpul mags, but the DPMS 19 rounders work fine......Changed to a Sundevil lower and same problem, bolt overrun. I called Magpul and they sent a new mag....same problem, bolt overrun. In looking at the DPMS bolt face, it appears the bolt lugs are beveled on the front side which may contribute to not picking the round up and therefore sliding over it. It appears the small difference in mag lip thickness may just be enough to not pick up the round....I would like to try a different bolt that has a better lug contact surface. Does anyone out there using magpul mags experience this and or have a solution to overcome this problem?