The Jelly Head Maximum is designed to increase the range and pattern density of your favorite turkey gun! The Jelly Head Maximum utilizes an extended taper and fluted ports to tighten patterns up to 20% and reduce recoil, allowing you to stop Gobblers in their tracks at even longer ranges. Primos utilizes proprietary Black-T coating, the same protective barrier utilized by the military's Special Forces to prevent rust and corrosion on weapons in the harshest environments, like turkey hunting. Available configurations: Mossberg 835/935 12GA (.690 constriction) Benelli/Beretta 12GA (.655 constriction) Rem ChokeSupertight 12GA (.660 constriction) Benelli Crio 12GA (.660 constriction)