That wrench, if I'm looking t it correctly, should be an excellent option. It appears to me that, unlike most AI action wrenches I've owned and seen, the SPR wrench has a port key that screws into the wrench instead of just a flat plate the fits into a slot on the wrench. That, in my mind, would give you more power when turning off a stubborn barrel. I have to say that is an attractive price too. The wrench I have costs $150 and most all I've seen were right in the same price as mine.