Steve shared this odd gun sitting in the back window of this pick up truck. Can you identify what this gun is made of? I see a Browning A5 Remington Model 11 inverted but the handguard is relocated. You can see the ejection port and receiver below.  I do not recognize the pistol grip.

The barrel is actually the bottom tube, you can see the extended magazine tube has a front sight attached to the faux muzzle.