It wasn't a manufacturing facility problem for that model. Most likely Imaginative crafting of a normal stock. Photos would assistance to determine the appx 12 months your rifle was built. 44 22LR, not for that 69A’s .22 S, L, & LR. I presume that this intended the chambering and rifling https://highimpactrounds.com/product/winchester-defender-segmented-slug-12-ga-2-75-in-1-oz-1600-fps-10-rd-box/