A coworker of mine just called and told me that 2nd Amendment in Whitestown has DPMS ARs for $616 (he's pretty sure that's what the price was). I've got 3 lowers that still need built but for the price are these a decent gun? I think he said flattop and obviously no optic but appear to be a good price. Anybody have experience with them? I'm kicking around the idea of another cheap plinker. Or something I can take out to share when others go with me.