Tapco Springfield Armory Hellcat 9mm Luger Threaded Pistol Barrel Black. An easy-to-install barrel simply just drop it in no gunsmith or other modifications are required. All threaded barrels also include a thread protector. Specifications for Tapco Springfield Armory Hellcat 9mm Luger Threaded Pistol Barrel: Manufacturer: Tapco Color: Black Finish: Nitride Threads per Inch: 1/2x28 Caliber: 9mm Luger Gun Make: Springfield Armory Gun Model: Springfield Armory Hellcat Tapco TAP22028 9mm Fits Springfield Hellcat Black Stainless Steel Tapco TAP22028: Springfield Armory Hellcat 9mm Luger Threaded Pistol Barrel Black