33% glass-filled nylon with pebble-grain surface, provides secure handling in all weather conditions. Furnished with a complete set of adapters and spacers for installation on 12 ga. Mossberg 500, Maverick 88, Remington 870, and Winchester 1200/1300 pump shotguns. Easy to install, requires no modifications to firearm. Formed steel with elongated cooling slots protects your hands from burns. Provides a secure, non-slip, grasping surface, plus maximum heat dissipation. Simply slide over barrel and secure with supplied hardware. Black oxide finish matches most shotgun finishes. No gunsmithing required to fit most popular 12 ga. pump guns.