SlingMate Safety Rifle Sling Accessory (Black) Keep your gun close with slings by SlingMate. The SlingMate is quiet and easy to use. Simply attach it to the swivel on your rifle and your existing sling. You then attach this to your sling and attach it again with military snaps, and use the quick release in the middle to remove it. It fits any rifle swing with a metal swivel, because plastic will break. This one-size-fits-all sling is designed for shotguns, rifles, and muzzleloaders.