Tell you truth there my man. I would rather have a PROVEN performer in my collection.
Most any fair to reasonable GUN shop will sell you a RUGER 10-22 carbine.
This carbine will do anything an assualt carbine could do. Especially with a couple of BX-25 mags and some stock 8 round rotaries.
Oh, plus you might end up paying a little less for it as well?
Good luck there bro.