If your not totally strapped for cash, this would be a good option. You get the full and semi auto in one, without being a smg
http://shop.ehobbyasia.com/pistols-gbb-smgs/tokyo-marui-g18c-gbb-pistol.html
http://shop.ehobbyasia.com/pistols-gbb-smgs/tokyo-marui-g18c-gbb-pistol.html