J Frame Mainspring Swivel Replacement?

TAROMAN · Jan 3, 2017

Starting work on one of those grungy LEO trade-in 640-1s.
Upon disassembly, I discovered that the rubber(?) mainspring swivel is half disintegrated.
Of course, it's out of stock everywhere.
I could make a brass replacement on my lathe in a few minutes.
So question is: Is there any reason that this has to be rubber?
Brass seems more better to me.

thanks.

armorer951 · Jan 3, 2017

I think they changed over to "plastic" because it's cheap, and it saves a bit on weight.

I've got an extra one of the plastic ones I can send if needed.

Looks like Numrich has some....(steel ones)

36-1 Accessories | Numrich Gun Parts

Alk8944 · Jan 4, 2017

I know S&W calls it a Mainspring Swivel, but "Spring Seat" strikes me as more appropriate. No, they don't need to be plastic, the originals going back to the 1950s in Improved I-Frames and J-Frames were always steel. It was sometime in the 1990s they changed to the cheap **** plastic ones that don't last! This wasn't a good place to save a few cents per gun.

armorer951,

Thanks for the reminder and the link. I have been meaning to replace the plastic ones in a couple of guns and this reminded me. Just ordered 3 from Numrich.

TAROMAN · Jan 4, 2017

Thanks fellas.
I'll just make one in the morning.

J Frame Mainspring Swivel Replacement?

TAROMAN

US Veteran

armorer951

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Alk8944

US Veteran

TAROMAN

US Veteran

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