What is the life of the gun and how many bullets can a gun use?

The lifespan of different guns is not the same.
Generally, if you fire continuously, several hundred rounds of bullets can't stand. The gun barrel will burn out？
不同的枪的寿命是不一样的，一般连续一直射击的话，几百发子弹就顶不住了，枪管会发热烧坏。