So good!

Looks really cool! Give em a pulse rifle though - that'll do the job better, especially with the grenade launcher it has.

Your barrel is going to melt! the end needs more cooling fins. (My friend Hooves is a gunsmith ex-fast-draw expert, I get to use him to bounce gun designs off of, I'm only a toolmaker and master welder).

I am drawing then rendering a MP (Scott Robertson methods) that never existed using a Borchart action instead of the parabellum of a Luger I still have to figure out what it looks like in isometric view like this one is, good job! :)

Wow, this is some good art!