Need help with Mk III 22/45

[wilit]

I've owned this pistol for 3+ years now and have never had a problem with it. I've become very comfortable taking it down and re-assembling it. Last night I broke it down and put it back together and went to function test it and it didn't work. I thought maybe I didn't get the hammer link into the spring cup correctly. Took a while to disassemble it but got it apart and reassembled it correctly. Still didn't work. Took it apart again and reassembled just the lower to see if I could figure out what the hang up was. The sear is having problems releasing the hammer. If I get in there with a small screwdriver and help release the sear, it'll function correctly after that. But once I remove the takedown lever/hammer spring and reassemble it, the sear locks up again. Releasing it with a screwdriver gets everything functioning again. Any ideas what I should do or look for?

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[!@#$]

i would detail strip it and clean it. maybe some lead,brass,or fouling in there. could be a spring is out of place or something broke.

[wilit]

I did disassemble the lower not realizing what a pain it is to put back together. Didn't see any broken or abnormally worn parts. Maybe I'll break it down again tonight and snap some pics.

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[wilit]

Looks like the mag disconnect is hanging up the hammer and the transfer bar. Just ordered a Mk II bushing to remove that useless piece of CA legislated BS. Got my fingers crossed that's the problem.

[red_eyez]

I swapped mine out with the Clark/Ruger MKI / MKII Sear Pin and Hammer Bushing Kit ($20). The mag disco safety is PIA when take down for cleaning. Mags also dropped freely after the disco was removed.