Maximize range time and effortlessly go through boxes of ammo with the ProMag® Glock®-Style AR-15 .45 ACP 40-Round Drum Magazine. This aftermarket drum magazine boasts a heat-treated stainless steel wire and an injection-molded polymer follower to ensure reliable, smooth feeding in target-rich environments. A proprietary DuPont® Zytel™ based polymer body and a blue steel upper magazine tower offer unmatched strength and long-lasting durability to take on all of the tough use you can throw at it during your range days so you can spend more time shooting and less time reloading. Backed by a lifetime warranty from ProMag. Does NOT fit Glock® Pistols. For use in PCC / .45 ACP AR-15 using Glock type magazines only. Made in USA.