Turret gun
From MediaWiki

Hound has a turret gun that is capable of projecting holograms. Or not. It's all very confusing, really.
Fiction
Marvel The Transformers comics
In his jeep mode, Hound's turret gun functions like a radar scope, scanning the surrounding landscape and storing this information as a topographical map with the help of internal 3-dimensional simulation circuitry. In robot mode, the turret gun becomes an infrared radiation collector that he can use to track machines as well as humans. Hound's Universe profile
During the Transformers' first battle on Earth in 1984 at a drive-in movie theatre, Hound faced off against Ravage and projected a holographic missile from his turret gun which caused the Decepticon spy to flee in terror. The Transformers
Notes

- So it's like this:
- The original Hound toy (as detailed in his instructions) came with a missile launcher, three missiles, a "hologram gun", and a "poseable machine gun".
- The bio accompanying his Tech Specs notes that he uses his "turret gun" as a radar scope and infrared radiation collector that tracks machines as well as humans, while his hologram gun projects 3-dimensional grid laser-light topographical maps.
- His Marvel Universe profile states that the turret gun becomes his handheld weapon in robot mode and splits its functions between modes, as noted above. To confuse matters further his hologram gun is said to be "shoulder-mounted", implying that it's his missile launcher that projects holograms.
- To confuse matters further further, in the first issue of the Marvel comic, Hound projects a holographic missile from his handheld weapon, which he calls his turret gun.

