I have a M&P R8 that is a real tack driver until the barrel loosens up. What's happening is that the barrel loosens from the frame and I take a small pin punch and tighten the spanner nut on the muzzle and the accuracy comes right back. The problem is that each time I do this it has the effect of opening up the cylinder to barrel gap ever so slightly. My cylinder gap is now at .022 inches.
What I need to do is remove the nut from the end of the barrel, turn the barrel back into the frame to reset the cylinder gap maybe with a small dab of Locktite and reinstall the barrel shroud.
My question is: Does anyone sell the spanner wrench that I need to crank the nut off of the barrel? I sure would like to buy a proper wrench rather than fab something up.
Thanks in advance;
Jim

Jim,

I think that this is what you are looking for.
Smith & Wesson TRR8 327 Barrel Nut Wrench Tool .357 - $34.95 : EWK Arms

It looks very much like a Dan Wesson barrel nut wrench. It only takes a small amount of torque to get the nut tight. Too tight and you'll be in a world of hurts taking it off again.

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