Here's a comparison of G1 Micromasters to Siege Micromasters:

As I said before, a very nice scale matching.

However, with these guys, the weapon modes are particularly ludicrous:

If I'd been designing these toys, I'd have added some extra stuff to make them more gunlike, vaguely akin to Targetmasters with detachable kibble.
Red Heat is the only one who comes close to being an actual gun, because his ladder extension looks almost like a gun barrel.