Sig M17 / M18 P320 Gas Spare Magazine

Sig M18 P320 Gas Blowback Pistol spare magazine. Holds 21 rounds (+1). Comes in either Co2 or green gas spare mags. Fits in the Sig M18 and M17 (cross compatible) gas blowback airsoft gun models. The M17 and M18 magazines fit both models. Black or tan baseplate; Co2 or Green Gas variants (see drop-down menu options)