I bought a Springfield Armory Saint Victor .556 recently. It just so happened that Springfield Armory is having a promotion in which I got a free Magpul magazine, a Grey Ghost sling and a Vortex Crossfire red dot. I didn`t know this promotion was going on, so it was a really nice bonus. I`m researching how to attach the sling to the rifle, but it seems like there can be multiple ways to actually do that, and it`s not obvious to me how this goes on the rifle. Did anyone else