You could end up with the equivalent of a duffle cut, if the stock isn't otherwise damaged or over sanded which it looks like it could be. You have some tough areas restoring the stock washers and clearing out the sling channel and it could be really tough if they used a superior glue. If it were not all matching, I'd just suggest getting a new stock. You are missing a few parts however that unless you get lucky won't have matching numbers. Hand guard, front band at minimum.