The flashhider on the PE90 is about 2'' long so by cutting it down, with a 1'' A2 flash hider and barrel cut by 1.5'' give or take would bring it down in length quite a bit. I guess is this fesible unless its cracked or somethin, that's the question?
There was a guy on CGN who screwed up his barrel by cutting it down, that's the last I heard and was looking for a replacement.