That was the way I had to go...
Printable View
The British canvas Mills sling was a better item than the U.S. version. It works!
Old leather slings tend to be valuable and brittle.
Of course the school gun and the regular rifle had the same swivel spacing - I put a Mills on mine to give it a 'tropical' flavor. A side note here is that there is some disagreement as to whether the (US) Mills is actually a rifle sling at all - it MAY have been intended for other uses, or even have had multiple applications.
The mills sling I have came on a canteen.