Not sure what you mean by "Strip model online" or "RRA reciever" unless you mean the Rock River Arms lower (frame).

I got a stripped receiver locally, and a Rock River Arms complete chrome lined upper... which was the upper, barrel, gas tube, foregrip, flash suppressor, bolt and bolt carrier group... basically everything except the stock.

The stripper lower was ~$200, the upper is $599 from RRA directly ($550 from where I got it), and I needed a stock $60, a lower parts kit (Trigger and all that, from bushmaster) $70 and a few other minor things.