I am just getting into Striker pistols and have some questions. Striker action what shank size? If a barrel is already set up as a large shank can it be machined to fit a small shank action? I bought a Wheeler wrench and I tried to loosen the barrel nut on a savage Ml'er II and the wrench wouldn't go on the nut but about a 1/4" So decided not try anymore and sold the wrench. Does the Smokeless Ml'r take a different wrench? I see where Midway USA sell a barrel wrench so much cheaper than the other retailers. Has anyone used the Midway wrench or should I just go for the more expensive Wheeler one for changing barrels on the striker? There is a gentleman on the 6BR sight who make action wrenches to fit the savage has anyone used one? I apoligize for all the question but I figured I best stop as I have more. hope you can make sense of my questions? Thanks Lou