Hoot,
At least it looks made as one piece. I have a similar one in my "junkbox" made of hand filed "claws" screwed to a weaver rail. In my opinion, your rifle had a long scope mounted on it originally in claw mounts and the front base was mounted out on the barrel. It looks like common rings were screwed to your home-made base and the whole thing was made to work as claw mounts. Now it looks cleverer than at first.
Mike

Last edited by Der Ami; 05/06/25 03:24 PM.