Lightweight, durable, and reliable are exactly what you should look for in a magazine. Look no further than the UTG windowed polymer magazine! This excellent magazine is built from high-strength glass-filled polymer. Compatible with AR-pattern rifles and designed for 5.56 NATO or 300 Blackout. With a high visibility anti-tilt follower, long-life stainless steel spring.Features: Durable polymer construction Hi-vis anti-tilt follower Stainless steel spring Textured for superior grip Windowed to display round count Over-instertion stop Removable flared base plateLeapers, Inc., headquartered in Michigan, U.S.A., has been in the business of supplying shooting, hunting and outdoor gear since 1992. With uncompromisingly high standards their goal is to make best-in-class niche products available for hunting, shooting, and outdoor enthusiasts like you. They have developed high quality products from a wide range of categories such as weapon lights, compact scopes, handguards, and other tactical accessories to fit your every shooting need.