Hard polymer insert snaps into the floorplate to limit capacity for sporting or hunting applications. Installs easily without tools and requires no permanent alteration of the magazine. Will not make a banned magazine legal, as capacity reduction is not permanent. Minus 5 reduces capacity by 5 rounds. Mfg: Magpul SPECS: Reinforced molded hard polymer, black. Sold in paks of 3.7.62 models fit Gen M3 PMAGs for rifles chambered in 7.62x51 NATO and .308 Win. 7.62 Minus 5 fits 10-, 20- or 25-rd mags.