No jamming designed NOT to overlap shotgun's receiver when cycling pump action. Eliminates chance of momentary jam by sling clothing or other material catching between standard forend & receiver. Made of black glass-filled nylon in the USA. Features recessed pebble-grain textured area that reduces chance of hand sliding from grip. Includes adapters. For: Mossberg 500/590 Remington 1100/11-87/870 Winchester 1200/1300 Maverick 1200 & Norinco 98 series.