In my opinion 90% of the slings purpose is to assist in shooting, the other 10% is for carrying. Keep that in mind when making a purchase. I have a cheap one from Wal-mart that works great. It has a series of loops for adjusting. Pull the outer loop toward the barrel and it gets longer, pull it toward the butt-end and it gets tight to the gun. It was only like $14 and I like it better than any of my previous, more expensive ones.