Sling swivels are the pivoting loops that join a sling to its mounting studs. Detachable and locking swivels fit traditional stud systems, while push-button QD swivels snap in and out of flush-cup sockets in seconds. Available in 1 in and 1.25 in loop widths from GrovTec, Uncle Mike's, ALG Defense, and Magpul, in sets and singles for rifles and shotguns.