SIG SAUER SIG SAUER MCX And MPX Air Rifle Magazine 30-Rounds. This patented magazine removes the limitations to firing speed in the SIG MCX and SIG MPX Air Rifle. Using a rotary pellet drive system the SIG RPM? smoothly feeds 30 rounds per belt - with three refillable belts included - for consistent optimized firing. Specifications for SIG SAUER MCX And MPX 30-Rounds Air Rifle Magazine: Manufacturer: SIG SAUER Color: Black Finish: Black Fabric/Material: Polymer Magazine Capacity: 30 Round Gun Make: SIG Sauer Gun Model: SIG Sauer MPX Quantity: 1 Set Dimensions: 5 x 2 x 1 in Projectile Caliber: .177 Caliber Package Contents: SIG SAUER AMRC17730 MCX And MPX Air Rifle Magazine SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER MCX And MPX 30-Rounds Air Rifle Magazine is compatible with? The manufacturer says that SIG SAUER MCX And MPX 30-Rounds Air Rifle Magazine is compatible with SIG Sauer MPXSIG SAUER AMRC17730 MCX And MPX Air Rifle Magazine