How can I get these in CA?

[Bowser]

[Waingro]

This made me think - it really doesn't have any evil features, no pistol grips since all the grips are above the gun, meaning you can have a detachable magazine or a belt fed. But logically it is ridiculous, BUT it would be fun to get a 9mm carbine firearm and do something like that to it and put a laser as a sighting device for indoor range fun.