Can Magazines Cause Short Stroking??

[Heavy Metal]

I don't know for sure at this point. I do know that with the GI mag, he would hand cycle the gun to get it loaded, fire it, and then attempt to fire a second and it would click on an empty chamber. He would hand cycle to charge it and it would do the same thing. It did this with several different GI mags (all of which were purchased new in wrap in the last six months). I checked to see if the gun was clean and lubed and it was reasonable on both accounts. We then slapped in one of my PMAGS and it went through a full mag of fast and slow fire without any problems. We haven't got the problem sorted out yet.

Sounds like overfunction. The PMAG is the only one good enough to keep up!


I would try a much heavier buffer like an MGI RRB.

[eightmillimeter]

What is it about the magazine that can cause short stroking? Is it the feed lips dragging the bolt?

If the hole for the mag catch is too low in the magazine it could certainly be possible, but that would take a serious QC oversight on the part of the mag manufacturer but I have to assume its possible.