Are pelet guns elegal?

No. It's an imaginary creation from the minds of some video game developers.

Yes many do rent out guns.

That's a vague question, and it doesn't seem logical. If you don't have a gun, how could you be arrested for a gun violation? But also, there's no way to know how long of a sentence you might...

Apples and oranges. Lewis was lighter, could be fired like a rifle, limited magazine capacity. Vickers was heavy, required a mount, belt fed, no limit to number of cartridges.

Cannon.