After getting my rifle back from repairs, I took it to the range to test it out. well it fired everytime that I got a round into the chamber, but after firing 3 round it started to have loading problems so I changed out the magazine to a pmag and problem solved. I have not a problem with it so far after firing 100 rounds through it. I decided to check the mags to see what the difference is and found the spring in the pmag is a little bit litter than the Mossberg mag perhaps that is the problem with the loading