The .50 Browning Machine Gun is a unit pattern developed for the M2 Browning – machine gun and was officially put into operation in 1921. The pattern is based on the .30-06 Springfield pattern. It is categorized as a standard unity pattern for NATO and non-NATO countries under STANAG 4383. The pattern is available in many variants including full metal jacket , light rail and armored drilling .
The .50 BMG is used, among other things, in long range guns, as well as other .50-caliber guns.
This dude is going to shoot it towards a train rail and see what the result will be.