Future Forged AR15 Gas Pin Jig - Made with carbon fiber reinforced Nylon this pinning jig for AR gas blocks will take a greater beating than the usual delrin or even traditional nylon jigs. This jig is designed to protect your parts by taking surface damage instead of the coating on your gas block! Designed to be a simple low cost alternative to traditionally made pinning Jigs. (Special thanks to Poor Man's Black Rifle Group)