QB78 modded with the addition of a 79 adaptor block, Ninja 3,000/850psi HPA tank and set up for Field Target,[smg id=1248]John
Can do a search here, but do feel the QB79 limits high power in HPA. The only air you can count on for a shot is that which is between the regulator and the valve (came to call it “on deck” air). If I were to use a 79 and go for high power, would probably just get a 1500psi out-put bottle (that being all the pressure I’d care to put into a co2 designed gun).