Nuke Airsoft reviews the KWA B&T MP9A1 Gas Blowback SMG which has been in the market for several years now. The A1 version has a folding stock and integrated foregrip with the whole body being made of reinforced fibre polymer. Magazine has a capacity of 48 BBs and the hop-up is adjustable... "The KWA MP9 has original B&T markings and scores despite its heavy price tag provides top of the line performance."
This video of the ASG MP9A1 Gas Blowback Machine Pistol will give you chuckles in some points. This is a preview of the review that 020 Magazine will do for their Issue No. 27. What they say for now is that they want one. So anticipate the upcoming issue which you can also read online. Just subscribe to them at their website.