I do love this toy of Bill's, the hilariously named LUNAR DUMP. Its on of a quartet by Parks. What interest's me here is it's rear 'turret'. There's something wholly futuristic about angled turrets pointing to the sky. I suppose as well they remind me of ant-aircraft guns from WWII [is that the same as a flak gun?]. Maybe I mean retro-futuristic? Anyways. in this case the turret is actually a telescopic crane.
Another fine turret is the SpaceX LAMA or Lunar Anti-Meteorite Attacker. Based originally on Ed Valigursky's book cover for Sinister Barrier, the LAMA fires satellites for detecting meteorites.
Can you think of any more angled turrets like this readers?