1911 Grip Bushings

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I need to replace my group bushings.
I need to figure out what size the ones I have are.
The hole in the frame is stripped out. I need to get oversized ones.

The pistol is a Rock Island 1911 TACII.
I bought it used.

I've read it used standard bushings and that it takes a smaller one..

I don't have a micrometer to measure them....

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Man. I was hoping this could be a DIY fix...

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Fell off again last night.
Gunsmith is going to fix.
I don't want to