Made in the USA, the PMAG 30 AR/M4 GEN M2 MOE Window is a polymer magazine for AR15/M4 compatible weapons. It features impact resistant polymer construction, an easy-to-disassemble design with a flared floorplate for positive magazine extraction, a resilient stainless steel spring that's black-oxide coated for corrosion resistance, and an anti-tilt, self-lubricating follower for increased magazine reliability. In addition, durable dual-side transparent windows allow for quick determination of the rounds remaining in the magazine. With a high visibility indicator coil on the spring and numerical markers on the magazine body, the MagLevel system provides positive verification without affecting the durability or reliability of the PMAG. Magpul Original Equipment (MOE) is a line of firearm accessories designed to provide a high-quality, economical alternative to standard weapon parts. The MOE line distinguishes itself with a simplified feature set, but maintains Magpul engineering and material quality. NOTE: This item is not compatible with SA80 and HK416, or similar, platforms.