I have wider rings but they are poor quality.
If there is a smaller rail, it would not be a bad thing to switch over, providing the holes line up.
Edit, just measured these rings and with the nut screwed in all the way it measures 13.6mm with my calipers.
Turns out my .22 has even narrower dovetails so these PH rings would be considered a medium size I guess.
Bookmarks