Converting Mk II to 22/45?

[Yaworski]

Hard to believe that I first asked about this process two years ago but time flies when you're getting older.

Today's question is about the mainspring housing. I can put the upper on the 22/45 lower. That's easy. However, when I insert the mainspring housing, I can't latch it. The hammer strut is where it needs to be as is the bolt stop pin.

Do I need to do some judicious filing of the hook on the mainspring housing?

 

[Dan in MI]

That is the usual problem on this conversion. It doesn't take much at all.

 

[TestEngineer]

The angle of the grip frames are different. Thus they use different MS housings.

 

[Dan in MI]

Unless I am way off, he is just swapping the upper, same MSH. The hook on 22/45 's don't always fit with a swapped upper.

 

[Yaworski]

I do have the mainspring housing that came with the 22/45.

 

[Dan in MI]

Can you put the MSH pin in from the top?

This is just an alignment check.