The nextgeneration PMAG 30 GEN M3 Window is a 30round 5.56x45 NATO .223 Remington polymer magazine for AR15M4 compatible weapons that features transparent windows to allow rapid visual identification of approximate number of rounds remaining. Similar to the MOE PMAG the GEN M3 Window features a longlife USGIspec stainless steel spring fourway antitilt follower and constantcurve internal geometry for reliable feeding and simple toolless disassembly to ease cleaning. While the GEN M3 is optimized for Coltspec AR15M4 platforms modified internal and external geometry also permits operation with a range of additional weapons such as the HK 416MR556A1M27 IAR British SA80 FN SCAR MK 1616S and others. Made in the USA."/\