Propane torch? Teddy, you may know something about good shotguns, but you don't know your basic welding parameters. Only the oxygen-acetylene process will allow those idiots like Ed Good to FUBAR the receivers and or lock plates to be re-colored, as well as warped and otherwise FUBARed for all time. Propane won't FUBAR them as well as Oxy-Acetylene does- as Ed knows only too well.

"The field is the touchstone of the man"..