I have five magazines for mine, some have had problems. It took a little fiddling with the cartridge retaining ears on top and the angle of the follower on one or two. I've had one which repeatedly popped apart where it was staked together; finally fixed it by sitting it on a block of steel and staking the riveted bits better with a punch. The mag that came with the rifle had a burr in the retaining slot that needed filed off, it didn't want to lock into the rifle. They can vary somewhat.
