M60 machine gun, gas opetated, belt fed 7.62x51 mm NATO std. round fired at a rate of 500-650 rounds per minute at 2800 feet per second and an effective range of 1200 yards.
Yeah but a gun is purely mechanical. It's not like one of those electric paintball guns where they'll freeze if it gets below 25 fahrenheit. It's completely analog, an engineering masterpiece.
You can throw a modern cartridge in water and it wouldn't do jack shit. It's pretty damn waterproof. Guns don't rust when you sneeze on them. They're oiled and painted.
Any questions?
uhhh...
mmmmhmmmmm....