The PMAG D-60 is a durable and highly reliable polymer drum magazine for AR15/M4 compatible weapons. Next-generation impact and crush resistant polymer construction Wide compatibility with most 'STANAG 4179' platforms such as the AR15, M4, M16, SCAR MK16/16S, HK416, MR556, M27 IAR, IWI Tavor, and others Will seat fully loaded on a closed bolt Bolt hold open feature to lock the bolt back on the last round Ratcheting Loading Lever to take tension off the spring for easy loading by hand Feed Tower compatible with most loading devices, including USGI stripper clips and guides, the StripLULATM, and others Designed to be left loaded for long-term storage without any loss of function or degradation All components used are corrosion resistant Easy to disassemble for cleaning with only a flat-bladed screwdriver or similar Anti-glare translucent window on rear of drum allows for easy determination of rounds remaining Paint pen dot matrix panel on back of body to allow for identification marking Slip-on, semi-rigid Dust Cover prevents grit and debris intrusion during storage and transport