Realspawn@ not exactly the same models, but the same sci-fi style, with old school look.
ratchet@ thank you, that model look pretty nice, but the end of the tube is too big, isn't it? Will be hard to aim

I tried to use MED to make anything like that, but I sucked

If I'll spend more time, I'm pretty sure, that I'll be able to make the shapes, but I can't create skin myself..