I use the old M1/M14 OD web slings on my retro ARs. All but one are nylon. My 602 clone has a correct cotton web sling. I have one retro of sort (my A2) with the black silent sling. I still need to get a few more OD nylon web slings. I have a few retro ARs without one right now. What-A-Country usually has them at a good price and varying degrees of use. They are anywhere from OD to a brownish-green color.
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