RTI Priest/Prophet extended pic rail
Regulators And Tuning Parts For Airguns (tip!)
Huma-Air Regulators And Tuning Parts For Your Airrifle Or PCP. -Market Leader In Accuracy-
www.huma-air.com
Quite easy to do. I turned mine just so that I could hook up my compressor with the gun sitting upright on the bipod.You can turn the reg to clear the lower rail. The gauges won't be pretty out the side but still useable.