I love the SCAR, but it is for bigger people, im 5ft 10" and it is big on me (not that im tall). I would suggest a P90 with a silencer for a barrel extention, if you like P90s, if not maybe an AUG A3 (im big on bullpups, but still havent got my mitts on one!). As for a non-bullpup: gun an M4! Mags are abundant, so you may as well take advantage. I would suggest a carbine from tokyo marui, or another trust worthy brand! Also a SIG 552 might be an option. This is your choice really, choose your favorite kind of gun and look at the ones in your budget!