A new product from Curtis at Ak-Builder.com. Please feel free to post pics on other forums if you like. I have tested these with turkey chokes, rifled slug tubes, and standard screw in chokes. All worked exceptionally well. These adapters are set up for the Win-choke tubes, so if you have a Winchester, Mossberg 500, or Browning Invector 12 guage, your tubes will work with this adapter. Please call Curtis for availability. They will be available with or without a full choke tube.