The PTS Enhanced Polymer Magazine or EPM replaces their old PMAG for GBBRs. With a redesigned main to reduce leakage issues seen with the original PMAGs. It has a capacity of 38 rounds and is compatible with all KWA LM4 type rifles, including the LM4, MKM, and gas Masada. The base plate features a dot matrix allowing you to identify your magazines with numbers or pictograms by filling in the dots with color. The magazine is also compatible with Magpul USA Ranger Plates.