Introduced to the public in late 1962 it was a development of the previous sporting rifles of the Model 721 and 722's, the Model 721 was the first truly modern sporting rifle of the 20th century. The M24 Sniper Weapon System (SWS) is the military and police version of that rifle, M24 being the model name assigned by the United States Army after adoption as their standard sniper rifle in 1988.
In airsoft this series of rifles is known as the VSR-10 or also Bar-10, but they all reference to M24 type airsoft rifles. One of the first modern airsoft rifles, the Bar-10 was developed by Tokyo Marui and has since been adopted by other airsoft manufacturers including Maruzen, Well, JG, and Snow Wolf. They are generally bolt-action type spring airsoft rifle that must be cocked before each shot.