This x10000
dont make the mistake i did when i was a kid. i had about 1100 bucks and ran out and bought a stag sar2t, i still have it, but ive replaced everything since i started getting into the guns and learning more. dont go out and buy some junk gun that will get you by. you'll end up upgrading it. might as well just start from scratch it is really not that hard at all to throw them together. if you played with legos as a child you can figure out an AR build. spend some time reading, watch youtube, and do it right the first time.
THIS....it is simple to build and you can build it how you want it.