Thread your .578-28 RH barrel to standard water bottle and coke bottles with this premium grade thread adapter.
Made out of quality black oxidized steel, simply screw this adapter on the end of your thread and that's it! Now you can adapt to standard (non "eco" cap) bottles!
Inner Threads: .578"-28 RH
Outer Threads: Water/Soda Bottle
Material: Black Oxidized Steel
Grip Width: 1 inch