Mine was a KISS carbine with A2 butt stock, 16" barrel and A1 upper.
It had an Olympic lower that I bought from one guy and a DPMS upper that I got from somebody else. Total cost with shipping and FFL fees was $605. That combo was plenty accurate and I never had any sort of failure or jam with it. It was a great little rifle but I just had no use for it.
When I tried to sell it, potential buyers were either put off by the "Oly" brand or the fact that it was a "built" rifle. If I had it to do over again, I would look for a factory-built Oly, DPMS or Bushmaster A3 carbine. Either that or I would just use parts from one vendor to build my own.
I ended up trading it for a pair of axles for my Jeep.