A rather too quick demonstration of the Crown Model XMP-K, which is based on the SIG Sauer MPX, equipped with the Wolverine Airsoft Inferno HPA engine as shown by Spectre9mm... "The Wolverine Airsoft solenoid valve unit Inferno is incorporated into the air cocking type air gun XMP-K (SIG MPX) released from the Crown model to make it a semi-automatic and fully automatic gas gun.

The solenoid valve unit used is a solenoid valve rifle and MTW unit sold by Wolverine Airsoft.

Hyperdouraku reviews an airsoft version of the SIG Sauer MPX, the air-cocking XMP-K. Too bad it is not a full blown AEG or GBB... "The XMP-K is an air cocking gun for those over 10 years old, was released in August 2019. The model name is XMP-K, but the shape is exactly the MPX, a multi-caliber submachine gun announced by SIG SAUER in 2013. The calibre is 9mm and can be converted to use the .357SIG, and .40S & W calibres.