Area 419 Sidewinder Thread And Taper Protector Black Nitride. Specifications for Area 419 Sidewinder Thread And Taper Protector: Manufacturer: Area 419 Color: Black Nitride Fabric/Material: 6061-T6 Aluminum Weight: 0.1 lb Country of Origin: USA Features of Area 419 Sidewinder Thread And Taper Protector 13/16" hex for tightening the Hellfire Universal Adapter onto the muzzle 1-2.75" Internal hex for installing Gen 2 Hellfire Suppressor Mounts 1-2.75" External wrench for emergency removal of stuck suppressor mounts Bottle Opener for removal of bottle caps Machined from solid 6061-T6 bar stock Package Contents: Area 419 Sidewinder Thread And Taper Protector Area 419 419BK-SW-TP: Sidewinder Thread And Taper Protector Black Nitride