I have a very nice Olympic A2 upper, take-off from a complete factory AR. The upper is freefloated, has preban features (bayo lug & A2 flashhider).
The barrel is HBAR profile, marked "556" and has the muzzle threaded with 1/2x28TPI. The bore is very nice and shiny. Bolt is semi-auto.
Condition: there are some light rub marks on the free-floated handguard and a couple on the barrel. The upper has almost no external wear and no wear on the deflector. There are a couple scratches under the forward assist channel, not readily visible when the upper is mounted. Bolt carrier and bolt have some finish wear.
I haven't used this upper, as it came with a preban lower that I needed for another build. I don't know how many rounds went through it, but it doesn't look like it was much.
Price: SOLD to mister2 $400 $385, $365 shipping included, money orders or PayPal are accepted. First person to reply with "I'll take it" gets the upper.