Hey there. I just built an AR-15 from PSA for $453 (that's with shipping), so I thought I'd share.
Let me start off by saying that I don't like AR-15s. I spent more time than I care to recount with an M16-A1 strapped to me in the military and I tend to prefer older guns (favorite being a Winchester 1894 30-30 pre 1964). I've worked on and fixed about a dozen over the years for family and friends however, so I've seen a few different models, but by no means I'd consider myself an AR-15 expert.
I spotted a PSA deal for about $420ish
about a month ago for a complete AR-15 and decided to jump on it. I still
wouldn't have picked it up had I not been introduced to the SSAR-15 Slide Fire stock. I already had one for the AK-47 and a homebuilt one for a Yugo SKS, but my wife doesn't like either of those weapons, so I finally pulled the trigger so-to-speak on building an AR-15. The reason mine was $453 with shipping was I went with the PTAC MOE lower build kit, I knew the SSAR-15 stock would require the milspec buffer tube.
I took a few pics uploaded here.
The only thing added to it in those pics are the rear sight (it came off the pellet rifle that looks identical
to an M4 AR-15 visible in a few of them - scary, eh?) and the Mossberg 30 round magazine.
A few things I noted about the PSA parts:
1) The bolt carrier group looks like a M16 BCG, plain and simple. I was actually surprised. The back end of the M16 BCG has a lot more material that interacts with the auto sear, all of the AR-15s I've worked on prior to this one have a lot less material, and even one manufacturer that makes a BCG that has no material at all on the back (Colt I think). It's heavier as a result so it'll probably fire a tiny bit slower but not enough to where most people would ever notice it.
2) The upper receiver is from BAFE, a lot of AR-15 manufacturers use their parts and they're fairly well respected.
3) The Anderson lower receiver met all of the tolerances really well. I can't say anything bad about them, but I haven't fired live rounds from this weapon yet (I just finished it a couple of hours ago). Hopefully tomorrow I'll get some range time in.
4) The barrel is sort of weird, it's a 16" barrel with a 1:7 twist and not chromed. Usually 1:7 twisted barrels are used for heavier ammo (72 grain I think?) for really, really long range shots and I know some people favor non chromed barrels since they're supposed to be more accurate since the rifling digs into the round better. In theory it should be fairly accurate but I'm not sure why you'd want that on a 16" barrel. Long range shooters from what I remember favored 20" barrels. Since it's not chromed using 'rapid fire' with a bump fire stock like the SSAR-15 will cause it to wear faster, but as long as you let it cool between magazines it should be fine for most people provided they aren't dragging it through a jungle.
Since I haven't fired real ammo through it yet (just snap caps) I'll hold off on a judgement but all of the parts met the tolerances pretty well. I'll post an update after I've ran a few boxes of shells through it, but even though I'm not an AR-15 fan I'm optimistic.