I recently Purchased a Remington M1 Garand ( the serial Number says it was made in 1942). It did not come with a sling. ( it was coated in 70 year old cosmoline ..yuck). Anyway, I bought a web sling for it, and looked on you tube on how to put it on. I saw several you tube video's about the how a loop is made and put above your biceps. I am not sure why you should do this? I have never been in the service , is this just something that is taught in the service? what is the reason for this please?