...M107

Well, if you know anything about me, you know that I like guns. I think guns are beautiful pieces of engineering and I've made it a goal to learn more about them. Also known as the Barret M82, the M107 is one of the finest sniper rifles made thus far.

It's a recoil-operated, semi-automatic, anti-material rifle. It uses .50 caliber rounds and was in fact built by Roy Barret specifically for the purpose of using that ammunition in a rifle. It has a range of approximately 1800 meters, just over a mile. Its about 30 pounds and is either 57 or 48 inches long depending on the barrel length. It is most often used to take out targets like trucks, radar cabins, parked aircrafts and the like rather than human targets, though it can be used against human targets from a standoff range or those behind cover.

See it here in use by a USMC sniper.  It is used by military and police forces in at least 30 countries all over the world. There's even an airsoft version!