This KNS Precision spring loaded steel push button pivot pin with sling swivel mount replaces the standard AR15, M16, or AR10 front pivot pin. When pushed, the stainless steel keeper pins retract for easy pin removal and field stripping. Once the pin is in place, simply push the button and slide the sling stud over the retracting balls and release. Can be used with quick release sling swivels. Using the pivot pin as a sling mounting point eliminates any added weight on the barrel and upper receiver increasing accuracy.