ProMag Industries ProMag, Magloader, Fits 5 Round AR-15 Magazine, Black PM017 This magazine loader was originally designed to load the (100) Rd .223 / 5.56 BETA magazine. The loader is slipped over any AR-15(R) / M16 .223 / 5.56 type magazine. Five cartridges are dropped in and loaded by depressing the plunger. The process is repeated until the magazine is loaded. Constructed of injection molded black polymer.