Mine has the same sling attachments. I had assumed the previous owner added them. Did they come this way?
Youper, I wish my grandpa was still around so I could ask him. Based on the fact that it has a white plastic spacer on the rear sling stud, I'm assuming they are aftermarket. Just a hunch though. I'm thinking my grandpa put them on there. I like the way it looks and works though, I may have to get rid of the white plastic spacer....