I am picking up a new Rock River Arms 20" Varmint Upper tomorrow from Rock River. It has the optional Hogue OD Green Free Float tube already installed. This is a complete upper, just pin it on you lower and add an optic for some very accurate shooting or varminting. It is a .223 with the Wylde match chamber with a 1:8" twist. I also have an OD Green Hogue rubber pistol grip to match available. If you ordered this upper from Rock River, the price without shipping would be $655.00. Due to Rock River MAP pricing, please PM me for the price if interested. Again, I only have one right now, and it's first come, first served. Thanks!