Area 419 Hellfire Universal Adapter Threads per Inch Black Nitride. Only purchase this to use your Hellfire Self Timing Muzzle Brake or Hellfire suppressor mounts on multiple rifles. Specifications for Area 419 Hellfire Universal Adapter: Manufacturer: Area 419 Color: Black Nitride Weight: 0.1 lb Condition: New Dimensions: 0.5 x 0.5 x 0.5 in Country of Origin: USA Gun Make: Universal Gun Model: Universal Features of Area 419 Hellfire Universal Adapter Universal adapter system allows TOOL FREE use of multiple muzzle attachments Mounts will be available for several TOMB style suppressor mounting systems. Change from an ultra effective muzzle brake to running your can in seconds without tools Universal adapter uses a taper surface similar to a machine tool for the absolute best alignment with the muzzle threads. Universal adapter is made in one operation on state of the art CNC equipment to guarantee concentricity with the bore Package Contents: Area 419 Hellfire Universal Adapter What firearm models does the manufacturer say Area 419 Hellfire Universal Adapter is compatible with? The manufacturer suggests that Area 419 Hellfire Universal Adapter is compatible with UniversalArea 419 419HF-ADT-3424: Hellfire Universal Adapter 3/4x24 Threads per Inch Black Nitride