I've been looking for an upper for mtw for a long time, it was unavailable everywhere, so a big thank you to Balystik for introducing this accessory to the market for MTW. It's not perfect when it comes to fitting with the lower of generation 2, because it has a little play, but it's still a saving solution and much better than 3D prints. And I would like to point out that the upper does not fit the Feed Tube from generation 2, only from gen. 3 or the installation of a standard Hop-up chamber.