Don't be afraid to use Body Putty or similar to build up the grips to fit your hand. My bullseye .22 is a IZH35M, and the grips didn't fit, so I build up a thumb rest, and using "Form-A-Grip", sold originally as a Bow grip material, I literally made a form fit grip. Wasn't pretty , but it sure fits. A little textured spray paint and your hand doesn't move. Perfect grip every time.

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H Richard
SWCA1967 SWHF244