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Discussion Starter · #1 ·
I was looking at drop-in trigger groups today and came across a CMC single stage that felt good and wasn’t quite as expensive as a lot of the others.

On the package it noted “small pins”. Which I believe was something 0.154 or something.

What sized pins are compatible with the M-22?

Do I need to looking for groups with the small pins or large pins,,, or does it matter for installation?
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