Butt stock extension piece for a rifle

This is an extension piece for an Anschutz .22 caliber small bore rifle.
Similar pieces come with the rifle to adjust the stock to fit the shooter. These parts are inserted between the wooden stock and the rubber plate at the end of the stock.

Dimensions are made to fit better than the original part, which is smaller than the wooden stock. Might fit other models too.

FreeCAD file is included in case dimensions need to be changed to fit your butt stock, or if different kind of attachment