The X Products Can Cannon is a patented, BATFE-approved AR-15 upper designed to safely launch soda cans and similarly sized projectiles (tennis balls, t-shirts, approved accessories, etc.) using blanks. Sold as a complete assembled upper (receiver, headspaced/installed ported barrel, and pressure tube), the Can Cannon uses a proprietary gas tube and blocking bar to prevent live ammunition from being chambered while diverting gas into a larger pressure tube for safe, repeatable launches.