Brass Buckle from DIV XIX

[JimDon]

I found the small brass buckle at DIV in Virginia at the site of a Union Camp. It looks like a small D and similar to a swivel sling for a gun my mine does not have a hole where one should be. it is a solid piece. Any idea what this is?

[creskol]

Need some better photos of the buckle if you can, and some measurements. Thanks

[JimDon]

Here are some updated photos.