Keep the rounds flowing all day and pick yourself up a spare 25 round magazine for your compatible Proforce Series gas blowback airsoft pistol. A Single 12g Co2 cartridge powers this magazine, which is housed directly into the magazine. Constructed fully from metal, this magazine from SIG SAUER can easily withstand heavy use while also providing a more realistic weight. A high tension internal spring smoothly feeds BBs from the magazine into the firing chamber of the pistol, with less chance of jams. Stock up on everything you need before your next airsoft skirmish and get one of these 25rd Green Gas Magazines from SIG SAUER today.