It was not a factory situation for that model. Potentially Imaginative crafting of a regular stock. Pics would assist to find out the appx yr your rifle was manufactured. forty four 22LR, not to the 69A’s .22 S, L, & LR. I assume that this intended that the chambering and https://highimpactrounds.com/product/winchester-super-suppressed-300-blk-200-gr-otr-1060-fps-20-rd-box/