My price range is around $100-$150. I'm trying to find a good entry-level gun that isn't made out of cheap plastic. Polymer is fine with me but I want it to be sturdy. I've found two that interest me but I don't know if they're good or not. The first is an ARMALITE M15 with a rail system and the second is an H&K UMP package deal that comes with two extra mags and BB's. Are either of these two any good? I'm planning on doing lots of outdoor games since my local field only has outdoor arenas.