Plinker Tactical AR-15 30 Round Magazines are constructed of a long fiber polymer that is extremely durable in the harshest conditions. The 30 round high capacity is perfect for those long days at the range or out in the field. The saying for the old lever action guns was something like: load up on Sunday and shoot all week. Well these mags allow you to load up on Sunday and shoot for 2 weeks. AR-15 mags also fit the M16 and M4 platforms. Plinker mags are made in the USA.