Put the latest and greatest technology into your AR-15 rifle, starting with one of the most important parts: the firing pin. This drop in part is coated with the patented EXO technology, and will increase the reliability of your firearm while decreasing downtime due to maintenance. FAILZERO tactical weapon upgrade parts are treated with UCT Coatings' patented, military-proven EXO Technology. This unique, breakthrough technology creates a permanently lubricious surface, harder than the substrate itself, which eliminates the need for grease, oil, or any wet lubrication for the life of the weapon. Unlike films, conventional coatings and applied lubricants, it will never rub off, never flake off, never build up crud. EXO Technology eliminates wet-lubrication failures of critical components, giving you an "active weapon advantage" under all conditions.