Latest review from BB2K Airsoft covers the KWA KMP9 Gas Blowback Machine Pistol, or also known as the ASG B&T MP9 GBB Machine Pistol. This is lightweight gas blowback airsoft gun that has flattop rails for mounting optics, molded foregrip, and an integrated folding stock. You can turn on the language caption whilst watching the video as English subtitles are available.