The longest-range sniper rifle, the TAC50 sniper rifle (LongRange SniperWeapon-LRSW), was developed by the United States in 1980
author:Firearms depot
The longest-range sniper rifle, the TAC50 Sniper Weapon (LRSW), is a sniper weapon for the military and law enforcement departments developed by the United States in 1980 and produced by McMillan for use in the 2001 Wars in Afghanistan and Iraq.
The Canadian Army's standard "Long Range Sniper Weapon" (LRSW) since 2000 has an accuracy of up to 0.5 arc minutes when firing race-grade ammunition.