Supplemental Impact/Dust Covers for the . 223 PMAG 30 GEN M2 MOE, PMAG 20, and EMAG, designed to minimize debris intrusion and protect against potential cartridge damage during storage and transit. NOTE: These will also fit all older pre-GEN M2 variants of PMAG (with Black or Foliage Followers). This cover will likewise fit the PMAG GEN M3 but, being it is of a slightly different design, will not adequately seal that magazine against debris intrusion.