One the finely made custom blowback pistols made by RA-Tech, this Kimber Royal II CO2-powered blowback airsoft pistol gas is based on a WE Pistol and fitted with all the CNC'd materials they can fit in. They also added a reinforced spring, 6.01 inner barrel, changed the hop-up rubber, put in a reinforced nozzle, and simulated moveable firing pin.

This is now in stock at WGC Shop, where you can get it for US$850.00. That's a premium price to pay for such a customised pistol.