(NEW) SIG Sauer P320 CO2 Pistol Magazine, 20rds, 2 Pack, .177 cal
NOT compatible with the SIG Sauer M17 or P320 Spectre Comp Blackout CO2 pellet pistols. Each mag holds 20 belt fed rounds. They are not, and in fact are 20 round magazines. These magazines are not compatible with the M17.