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Discussion Starter #1
After shooting a hundred or so rounds through my MKII 22/45 yesterday, I began having problems with the second to last round feeding. Always and only the second to last round. Other than that, the gun fired great. That was, until I noticed the Sear Pivot Pin coming loose and hanging out the the right side of the pistol, completely unattached from the left side. I had to disassemble the pistol to get it to realign. I fired a few more dozen rounds through it and had to press the pin back in after so many shots.

I have to wonder first if this is what was causing the FTF's and secondly... how to keep it from coming back out?

This gun has had very many rounds put through it in its lifetime. The gun is so loose that, disassembly and reassembly is easily accomplished with no tools. I don't know if all 22/45s are like this, but my MKIII Standard is a pain in the sear to strip.

Have I just gotten all the life out of this gun, or what can I do to get the sear pivot pin to stay in?

Thanks in advance!
 

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This could be the source of your FTF's. Check and ensure that the sear pivot pin is installed properly, these pins have a groove cut in one end to lock it in place. The groove goes on the left hand side of the pistol. If that is the position for the sear pivot pin's groove then check the installation of the sear spring long leg. It should be positioned behind the hammer pivot pin, this positioning of the leg is what locks both pivot pins into the frame. This spring position could go unnoticed if the hammer pivot pin has the new style hammer pivot pin, with the slight head on it.

Here is what to look for in your pistol.



Hope this helps.

R,
Bullseye
 

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Discussion Starter #3
I'll tear it apart again tonight to see... I wouldn't expect the spring to be out of the groove, but then again I can't remember seeing a groove. Maybe that's what kept it from coming completely out.

I'll see if I can get some pics too.

Thanks
 

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The 22/45 sear and hammer pins both should have grooves cut in one end, this is what keeps them locked in place. Your sear pivot pin should look like this one.



The grooved end is always on the left side of the frame, the side with the thumb safety and bolt catch release. The sear spring's long leg is what locks in the pins and keeps them from walking. It goes over the sear pivot from front to back and the hammer pivot from the back side. This configuration keeps the spring leg locked into the grooves and holds the pins fast in the frame.



If you don't have a groove on that pin then there's the problem! Wrong pin installed in a 22/45.

R,
Bullseye
 
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