Disabling magazine disconnect "safety" on Ruger Mk. III

[RyanM]

I'm planning on buying a Ruger .22 soon. Hopefully I'll be able to find a 22/45 Mk. II in good condition, but I may have to go with a Mk. III (either).

How easily can the mag disconnect be disabled on a Mk. III? I've read that it's possible by swapping out the hammer and hammer bushing with Mk. II versions. Is this true?

Numrich is out of stock on all Mk. II hammers, and I can't find anywhere else that sells them. If the above is true, can the Mk. III hammer work with the Mk. II bushing, with or without modifications that can be done with hand tools only? If not, does anyone other than Numrich sell hammers? I forget the difference between Mk. II and Mk. III mags, so would a gun so modified work with either kind, or just one?

 

[battlecry]

Easy enough if you have the two parts you mention. I take that back. I did the sear at the same time and cursed a lot when I did it.

Yes, it is true. I did that to my Mk III and works fine.

Yes, but I wouldn't do it like that. The III hammer makes room for the mag disconnector, you could replace it with a washer, but why add friction parts?

When I got my gun, I got the MkII bushing then ordered a Mk II hammer and sear from Rimfiresports in VA. Check MKIII.org for posts or links by Bulleye. He knows his stuff.

I'd stick to MkIII mags on the MKIII because of the different mag releases.

Regards, R

 

[RyanM]

The store had a used Mk. II, hooray. The new 22/45 Mk. IIIs were a little out of my price range, and I liked the way the Mk. II felt, and it was a good price, so I got it. So I guess I don't need to worry about the darn safety.

 

[darwin-t]

For future reference, you need to change the hammer and hammer bushing. It isn't too hard to do, I did mine when I got it and switched it back to stock before selling it.

I wouldn't own a MKIII if I had to keep the magazine safety. It''s a major pain the the neck - you have to put the magazine in or take it out several times while field stripping.

I don't remember where I bought the parts, but I had to order them from two diffeent vendors.

It was easier for me to work on a MKIII 22/45 than a MKII - there's a bit more room inside the frame to work.