James Grant of Burst Review puts a Century Arms C308 to the test by firing 1,000 rounds of 7.62×51 without stopping. Obviously he had to stop for magazine changes.  The C308 is a clone of the proven H&K G3 rifle. There are some malfunctions due to rounds not extracting. My favorite line is “It kinda smells like CRAYONS!”

After about 300 rounds, the handguard falls off.

The video is a little long. It is 36 mins long. To show that he did indeed fire 1,000k rounds, he filmed it with multiple cameras. One of which was a GoPro which the video from that is superimposed picture in picture and unedited. So you can see there were no real delays or stops between cuts of footage.