Booligan Airsoft does a megatest with the PTS Enhanced Polymer Magazine (EPM) to see if it can fit the rifles that accept M4-style mags in his collection... "Sometimes, you just need to pull out all of your guns and test out a magazine. Today is one of those times! PTS popped over one of their new EPM mags, so I figured the rational thing to do was to get out every gun in my collection that will fit it and put some rounds through it!"'