KAK Industry Plan B Universal Muzzle Device 11/16x24 Nitride Black. These Plan B muzzle devices are compatible with Plan B suppressor mounts. It is recommended to use Rocksett for installation and 20-25 ft-lbs of torque. Some suppressor manufacturers will not honor warranty claims if other brands of muzzle devices are used with their suppressors. Specifications for KAK Industry Plan B Universal Muzzle Device: Manufacturer: KAK Industry Fabric/Material: 17-4 Stainless Steel Color: Black Finish: Nitride Length: 1 in Weight: 1.6 oz Features of KAK Industry Plan B Universal Muzzle Device: Overall Length- 1" Outside Dimension- .895"" Package Contents: KAK Industry Plan B Universal Muzzle Device KAK Industry 414-2103-001: Plan B Universal Muzzle Device 11/16x24 Nitride Black