SIG SAUER P320 XCarry 177BB 21 Rounds Air Rifle Magazine. This magazine is compatible with the following SIG AIR model: P320 XCARRY CO2 BB (AIR-P320XCA-BB) Specifications for SIG SAUER P320 XCarry 177BB 21 Rounds Air Rifle Magazine: Manufacturer: SIG SAUER Color: Black Fabric/Material: Polymer Magazine Capacity: 21 Round Projectile Caliber: .177 Caliber Caliber: .177 Pellet Gun Make: SIG Sauer Gun Model: SIG Sauer P320 X-Carry Number of Rounds: 21 Package Contents: SIG SAUER P320 XCarry 177BB 21 Rounds Air Rifle Magazine SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER P320 XCarry 177BB 21 Rounds Air Rifle Magazine is compatible with? The manufacturer says that SIG SAUER P320 XCarry 177BB 21 Rounds Air Rifle Magazine is compatible with SIG Sauer P320 X-CarrySIG SAUER AMPC-BB-P320XCA: P320 XCarry 177BB 21 Rounds Air Rifle Magazine