USGI web sling for me. Had the same one on for every runngun until the last one - it was finally getting some wear. Probably had 100 rough miles on it, not counting however much walking on many hog hunts with it. Probably would last another 500 miles, but I opted to put another GI sling on just to be safe.
BTW - that's a cotton sling on mine, not nylon.
BTW - that's a cotton sling on mine, not nylon.