Originally Posted by
weggy
The rifle will fire 3 or 4 rounds then the top round will not feed because it will nose dive in the magazine. This is common in all the different mags. I also noticed that that mags feed lips do not hold the rounds secure in the mag when near capacity, this seems to be mainly true on the right side of the mag. The round on that side comes up at an angle the causes the BCG to not be able to feed it into the chamber. I know there is nothing wrong with the build (not my first build) because on the rare occasions that the rifle does feed properly there are no indications of any problems. I've, as a precaution, taken the rifle to a gunsmith and had him check the gun and my build, Because who knows , maybe I did do something wrong.Wouldn't be the first time. I had him also check the head space just to make sure that was OK. That leaves only the mags, and since the rounds are not making it into the chamber, I don't know what else it could be.
I recently bought a magazine from MWG, their 30rd IK-510 polymer AR15 model, I bought it for my 5.56 Adcor Bear Elite. I loaded it with 28 rounds of 5.45x39 and have fired 120 rounds though my 5.45 build and have not had any problems at all. I took the mag apart and the follower is their own design and it does not allow the rounds to tilt down into the mag. It also has a "substantial" spring.
I'm glad that your mags work for you guys, but they don't work for me. I have at least a dozen ASC, C products and D H Defense mag for my regular ARs and the all function fine. I was hoping for the same results for the 5.45 but it just ain't happening.