Mystery Ranch just rolled out a new sling system this year. It goes above and beyond a traditional rifle sling as it has a horizontal strap that hooks across your chest to the opposing backpack strap. This keeps the rifle from slipping off your shoulder and has a quick release buckle near the sling that a simple pull of a strap releases the sling from the horizontal strap. It then goes to the next level with a "hook" that easily attaches to your backpack belt and the butt-stock rests and remains there. I saw it at ATA and was very impressed. I just got mine in this week and already have it mounted on my rifle and primary backpack. In my limited usage I am very satisfied and ready to get it off flat land and into the mountains this elk season to see what it can truly do. The only con I have at this point is when the quick disconnect buckle is reconnected by it's magnetic catch, it does make a little more noise than I like. Though if I am reconnecting the shot is either over or the opportunity passed and the "click" shouldn't be a problem. I really think this is going to prohibit, or at least dramatically reduce, gun slide, movement, shifting, ect. while hiking and mobile hunting. It also works with a backpack rather than going over or in place of a backpack when using the backpack style straps. Lastly, I practiced removing the gun from my shoulder sling position and I was very impressed at how little extra effort it took and how quick it was. It was maybe 1-2 seconds slower than a traditional sling, but if it does what I think it will do then I am more than happy to sacrifice those couple seconds. And it is a hell of a lot quicker than a 2 strap or backpack mounted carrier that requires the pack be removed.