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Eliminating the Ruger MkIII-22/45mag disconnect

Discussion in 'Gunsmithing and Repairs' started by flightsimmer, Apr 6, 2013.

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  1. flightsimmer

    flightsimmer Member

    Nov 1, 2008
    S.E. Indy
    First off, I'm sorry I don't have any pictures, so I will have to use words to describe what I'm talking about. There are lots of good pictures on the internet though and this is easy to do.
    The reason I went this route is because I forgot when I ordered a Volquartsen trigger kit for my Ruger, Mark III 22/45 Lite to also order a Ruger, Mark II hammer pivot bushing and I didn't want to wait or pay for the extra shipping for a new one.
    As many of you already know about using a #10 sized washer to replace the magazine disconnect bar, I will only describe how I did it.
    I used a loose fitting wooden dowl through the inside of the washer and held the edge of the washer softly against a grinding wheel and let it spin to grind down the outside diameter of the washer to .240", this is so it won't interfere with the sear engagement and then cleaned up the rough edges with a file and buffed it.
    Now the inside diameter of the #10 washer I had was just a smiggin to big and fit loosely on the hammer pivot shaft, so I used a 5mm, 1/4" socket and a hammer on each flat side of the washer to swage the center diameter down just a few thousandths so it would fit snugly on the shaft and not move around and then pushed the washer onto the long end of the shaft up against the shoulder so it was firmly held in place and then reassembled the pistol and checked the function.
    The kit and the washer works great and now I have a very light, compact .22 that has a 2-1/4 pound trigger pull that breaks like glass and the magazines fall free when changed.
    Although I liked the Ruger, "Lite" from the start, I like it even better now.
    I hope you were able to follow my description.
  2. Drail

    Drail Member

    Jan 17, 2008
    I have done a few of those jobs for friends and always thought it was truly a shame to have to go to all that trouble to convert a Mk III into a - MKII. And now I am down to my last spare MK II hammer and bushing. How far we have fallen. These lawyers will be the death of us all.
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