SIG Sauer MPX .177 CO2 Air Rifle, 8-inch Rifled Steel Barrel, Folding Sights, Black — Factory New
This SIG Sauer MPX .177 (4.5mm) CO2 air rifle is a factory-new example configured as a practical training analog to the centerfire MPX platform. It features an 8-inch rifled steel barrel, a full-length Picatinny top rail, and factory folding sights, all in a black polymer-stocked package. Made in Japan, it runs on threaded 88 g or 90 g CO2 cylinders and arrives complete in its original box with paperwork and a factory SIG AIR MPX magazine installed.
Condition
Overall Condition: Factory new condition, unfired with no signs of handling. Includes all accessories and paperwork in the original factory box/case.
Bore Overall Condition: New - As-new bore with no signs of use beyond factory testing.
What’s Included
- Original box with molded foam insert
- SIG Sauer MCX/MPX CO2 Air Rifle owner's manual
- Small bag of hardware/parts (unidentified)
- Factory SIG AIR MPX magazine installed in the rifle
Designed as a training companion to the SIG MPX, this .177-caliber air rifle mirrors key handling characteristics while using CO2 power for economical practice. The action is CO2-powered and semi-automatic, operating with threaded 88 g or 90 g cylinders for extended shooting sessions.
The barrel is an 8-inch rifled steel unit for pellet stability and accuracy. Overall length is 25.75 inches, and weight is approximately 6.2 lb, giving the rifle a substantial feel that supports realistic training and steady offhand control.
A full-length Picatinny top rail runs continuously across the receiver and handguard, and the rifle comes with factory folding front and rear sights ready for immediate use. The polymer handguard, stock, and black synthetic pistol grip with textured panels provide a durable, consistent interface.
Markings include MPX and .177 CAL (4.5mm), with a clear MADE IN JAPAN import stamp. An alphanumeric production code is present on the magwell. The included factory SIG AIR MPX magazine is installed, and the rifle is identified by mfg part number AIR-MPX-177-88G-30-BLK.