Magpul is the name that comes to mind for most people when they mention AR-15 accessories. There is a good reason why that is; as their parts are bombproof and virtually indestructible.
Push-button quick-detach sling swivel for 1-1/4" webbing, compatible with QD sling attachment points. Manganese-phosphate finished steel. Can be /used on all slings, uses an industry standard mounting size.