Visible crew/equipment: When on the asteroid, Rockhound starts to play with the gun. To stop him Harry goes over and pushes him off and they both go flying through the air. Just before they hit the floor you can see the zip wire they flew across on.
Visible crew/equipment: During the scene when the crew is trying to disable the bomb, the camera pans in from a wider shot to a close up twice, once at the start of the scene and once towards the end. During the second pan, on the left side of the screen, the matte box or some other part of the camera can be seen.
Visible crew/equipment: There is a reflection of the cameraman & crane in fume in the outside shot while A.J. and Lev discuss controls of the Armadillo, before they reach the canyon.
Answer: If you look at the deleted scenes on the special edition DVD, you will see a deleted scene in which A.J. asks what they needed a gun for, and Max explains that it's for debris elimination, in order to take out small rocks in the way.