>>7067174The guy probably has the gun there because that's where you store it when you have the TFA Falcon closed up.
One of the play ideas for the TFA Falcon is once you have it opened up, you take the cover piece you removed (which has lots of molded details on its interior) and attach it to the back of the Falcon to form a little base or something. You then attach the gun to the cover piece as a base defense gun.
It's a fun Falcon, well worth picking up for the sub-$50 it goes for now. Everyone maligns the Nerf feature, and yea I could do without it, but the Nerf stuff hides completely inside the Falcon when not in use, and shooting stuff with Nerf darts is fun (conversely, I absolutely hate when the Nerf stuff is visible like on the TIE Striker toy).