No experience with those, but I've considered buying thr same PSA combo. I'm interested to hear your opinion on it once you shoot it. The only complaints I've read about it are the lack of documentation and it uses a mix of DPMS spec parts and Armalite spec parts, and that one of the takedown pins is a PSA proprietary part. The proprietary part is what annoyed most people. I can find links fot what is armalite and what was dpms if you need me too. I think I book marked on home computer.

Good luck and post back your opinion on it.