The gun is not yet in hand but I expect he'll need the hammer, trigger, cylinder latch, cylinder latch spring, pawl/hand, base pin and, umm, that one other spring...loading gate plunger? (All from memory so it's likely flawed).

Of those parts, the hammer, pawl and cylinder latch are probably the most important. The conversion trigger can be modified to remove the transfer bar 'leg', the conversion base pin will work as is and I never understood why the springs needed replacing.

Thanks Bud!

Back when I thought I was going to collect Rugers, I used to hang out there a lot. There's a coupla folks who drop in here that are bona fide Ruger collectors and I was kinda hoping one would have a lead. If memory serves (and don't take that bet), the .357 is the smaller frame while the .41 is the larger. I **think** the hammer height is the only difference in the parts.

As for buying a 'donor gun' and swapping parts, the .41 he bought IS the donor gun. And it is the 4-5/8 barrel so I am slightly jealous...

Thanks again!

Both of us are dyed in the wool cheap so-and-so's but I did see that when I was checking out some others. The OM .41 is the only caliber I don't yet have. One will turn up sooner or later.