Rifle across the back I'd like to build a hunter minifig with a rifle slung diagonally across his back.

I thought about using the dual katanas armor  but it looks like it would only fit a flat blade, right?

Does anyone have any ideas?

Also, what would be a good torso for an outdoors/forest/hunter type?
You could use

Minifigure, Neck Bracket with Back Stud

28974 thick /  42446thin

With
Tile, Modified 1 x 1 with Clip

15712 / 2555