For what It's worth, its a silly idea. The extended barrel isn't going to give you much of an advantage in range or accuracy, the gun shoots 400fps out of the box, so you don't need the FPS bost, all you would be doing is making what is a compact gun longer, with negligible performance bost offsetting that. If you like the look, sure, go for it, but your silencer isn't going to silence with a barrel running to the end of it, and you will have to change out the barrel if you want to remove the silencer. So I wouldn't do it..