We like guns. Real guns. Not some airsoft, or paintball stuff... Just the things that make a big boom and makes the television you set up down range pop. You can talk about airsoft and paintball here, but lets try to keep the focus on the REAL thing here, please.
In the reality, the machine gun barrels must be changed after every thousand shot, because it became very inaccurate and it's jams.
Not true... If you changed it every hundred shots, you'd be lugging around 50 lbs in barrels alone. You change it when it starts to warp, which could be anywhere between 8000 rounds to 20,000 rounds... Depending on conditions, weapon, and quality of the barrels of course.