Having just started back into building S&W-based custom revolvers after a few years off...
I dragged out the old MGW frame wrench and inserts, but I've lost some of the barrel blocks. I think they came from Precision Specialties in Feeding Hills Mass.
They are 2" cubes of nylon with the barrel profile broached through the centre.
I think they came through the S&W armourer's school , along with the old leather lined "U" wrench that we used before the MGW one came along.
Any Ideas where you can get them?
Cheers

I have the same set of 4 that I purchased years ago. It was Precision Specialties, and I too have the leather lined aluminum frame wrench. One of the best purchases I ever made.

Do you know someone with a mill, or do you have one? I think Delrin or nylon blocks would not be too difficult to make using a mill. Sorry I can't help you.

You can cast whatever you need from two part epoxies or JB weld...... Greasing the gun and making a form from tape.

I use 3M panel bond adhesive.

Brownells sells frame blocks, check them out and see if they are the same width as your wrench.

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ΜΟΛΩΝ ΛΑΒΕ

He needs the barrel blocks, not the frame blocks.

Here are the blocks and wrench he is talking about, but I only have 3 blocks, not 4. The wrench wraps on the revolver frame in front of the frame window and works great. Of all the guns that I have removed and installed barrels on, I only have had one gun, a Model 686 with the IL, that I could not bust loose the barrel. S&W must have really torqued that barrel on. Excuse the foot.

Thanks Guys, they are the ones.
I cannot find Precision Specialties listed anywhere, so I guess they either went bust or got bought out... any ideas?
Casting the barrel blocks seems like a neat idea, thanks for that.
Cheers

I tried searching for them on line, but to no avail. Good luck with your venture of casting the blocks.