I dislike "fake" stuff, especially in guns. If you're going to have a fixed stock, get an honest one. If you're going to have a 16.1" barrel, put it all to work either launching rounds or supressing flash. A fake collapsable stock will be annoying ("why won't this collapse? ...oh, right..."), and a muzzle brake does nothing useful where an extra 1.5" will improve accuracy & muzzle velocity.