The M82 was made in 2 calibers. The original used the .50 BMG cartridge, which fires a bullet that is .510 inches in diameter. The weight of the bullet varies depending on WHICH bullet is used, but is in the area of 700 grains weight. The later version of the M82 was made in caliber .416 Barrett. This is, as the name suggests, a .416 inch bullet that weighs 400 grains.
The M82 by Barrett Firearms Manufacturing. it's a .50 cal sniper rifle. to be more to the point the airsoft rifle is based on the later M82A1. Unless your talking about an assault rifle, that would be the Valmet m82.
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).
$ 9000
M40 rifle, M24 rifle, M110 SASS (semi-auto sniper system), or M82.
The Barrett M82 anti-materiel rifle has a standard magazine capacity of 10-rounds.
barrett M82
Roughly $9,000, plus a few thousand for the optics.
If you mean a rifle chambered for the .50 BMG cartridge, such as the Barrett M82, the EFFECTIVE range is about 5,900 feet. The rifle weighs about 30 pounds, and sells for about $9,000.
The RT-20 and Denel NTW 20x110 both utilise a 20x110mm cannon cartridge. They are the most powerful sniper rifles currently seeing military service, surpassing both the 14.5x115 sniper rifles, and especially surpassing the 12.7mm sniping rifles (such as the Barrett M82/M107, MacMillan Tac50, etc.).
Certainly the M82 (Barrett) and its numerous variants is a qualified Elephant Gun since it employs the .50 caliber BMG cartridge (12.7x99mm NATO). Many other Sniper Rifles are capable of killing such an animal, but big game hunters insist on a heavier round to insure a clean kill.
The M82 Barrett fires standard .50 BMG cartridges with a muzzle velocity of about 2799 feet per second. As with all bullets, they begin to slow after leaving the muzzle.
It is illegal to purchase or possess black powder for use in modern firearms like the Barrett M82. Black powder is considered an explosive and is highly regulated under federal law. It is recommended to use commercially available smokeless powders specifically designed for these firearms.