The Can Cannon has been officially acquitted by the BATF and is not considered a short barrel shotgun, short barrel rifle, or "any other weapon" when installing it on an AR-15 lower receiver. Our new design restores the Can Cannon back to the status of "not a firearm" and "not a destructive device". The best part is that there's only one small piece of the Can Cannon that needs to be replaced in order to make it 100% street legal. Existing customers should go to our Can Cannon gas port swap program at: https://xproducts.com/legalize-my-can-cannon. If you'd like to see the response from the BATF you can click here to read the full BATF Approval Letter