This sniper rifle is an anti material rifle, using .50 caliber. It can penetrate even light armoured tanks (in real life). 

Real Life vs Games:

• The Barrett M95 sniper rifle is not used by the US army. The US army choose to use the M82 barrett instead (but it seems, a lot other countries and some special forces use the M95 though)
• The Barrett M95 sniper rifle not a semi automatic rifle, you cannot shoot several bullets directly after each other. The M95 is bolt action, that means, you have to load the next bullet manually to the chamber. 
• The M95 is more deadly in real life than in games: It uses .50 caliber rounds, they are so big and travel so fast, that even a slight hit will cause a deadly wound: for example: if it hits an arm, the arm will be ripped off. The victim will die very fast due to blood loss or die immediately due to the impact. It is very unlikely to survive a hit from a .50 bullet.

Differences to other Barrett models:

The main difference to the M82 sniper rifle is the design: the M95 is a bullpop designed rifle, which makes the rifle shorter (the magazine is behind the trigger, in the M82 Barrett rifle, the rounds are located in front of the trigger).

Difference to the M90 Barrett sniper rifle: The M95 has a pistol grip and the trigger moved a little bit to the front, so the magazine can be replaced more easily.