It wasn't a factory issue for that model. Maybe Imaginative crafting of a typical stock. Pictures would enable to find out the appx calendar year your rifle was produced. forty four 22LR, not to the 69A’s .22 S, L, & LR. I think this meant which the chambering and rifling https://highimpactrounds.com/product/winchester-super-x-20-ga-2-75in-20-pellets-3-buck-1200-fps-5-rd-box/