Man I can fast rope with one hand LOL. Just kidding. I'm always worried I'm gonna end up being that guy who falls.That's why I stated "jettison before you put your rifle in your vehicle". Some things are all but impossible without a sling, fast roping for example. Slings have many uses no doubt, but attached to a rifle inside of a vehicle you may have to exit in a hurry....never a good idea. As always, YMMV.