Heavy Duty Side Release SwivelBlue Force Gear Heavy Duty Side Release Swivel The Side Release Swivel allows for the secure attachment of a Vickers Combat Applications Sling to traditional sling swivel studs found on many hunting rifles, shotguns, and modern bolt action rifles. The Side Release Swivel provides a 1. 25" sling slot and is phosphate finished for corrosion protection. The Swivel is installed to the weapon by unscrewing the knurled locking collar, pushing the side