Try to find an older mag that is all metal. The new ones have the plastic on the bottom. I have found that they are not nearly as reliable as the older ones. If you have an old gun shop or a pawn shop around they should have some laying around. I have not had good luck with the new clips, on the other hand, I've had no problems with the older ones.
The problem with these mags is that after a while the little notch at the rear of the mag becomes worn and won't stay in place properly causing feeding problems. Be carefull when buying used mags and folks just sell them off after they stop woking right. I don't care what the mag looks like, but if it's overly worn on that notch I avoid at all cost.
