plain and simple.yes. but not the most accurate.
The Barret company manufactures following types of firearms: nine different sniper rifles, two kinds of assault rifles, machine guns, optics and ammunition.
By which side? The US and its allies used 7.62x51 for their sniper rifles. The North Vietnamese typically used 7.62x54R for theirs.
22 LR up to and beyond 50 BMG
This is subjected to opinion but they most used sniper rifles are the Barret 50. Cal and the Intervention. The Intervention is the more commonly used of the two so it is considered the best sniper rifle.
I believe you can purchase it at AirsoftGI. I assume your looking for a Barret(See Link Below)
Yes. You can get replacement springs for airsoft sniper rifles.
The Barret 50.cal sniper rifle was invented in 1982.
If you mean the 12.7x99 cartridge, also known as the .50 BMG, and fired by weapons such as the Browning M2 machine gun and Barret sniper rifles, no.
The manufacturer is spelled Barrett (Barrett Firearms Manufacturing), builder of the M82 and XM500 .50 caliber sniper rifles that fire the 12.7x99mm NATO round (Browning machine gun round).
It is often accepted the Heckler and Koch PSG-1 is the most accurate sniper rifle in the world.
Any bullet that has a diameter of one half inch is a .50 caliber bullet. There are different .50 caliber bullets- my Hawken muzzle loading rifle shoots a .50 caliber lead bullet, but different from the .50 Browning Machine Gun (that is also used in the .50 Barret sniper rifle)