A term that is sometimes used for oceanic crust rocks is sima, which is short for magnesium silicate, a common component of these rocks. Another term for these undersea igneous rocks is mafic, which comes from the fact that they are high in magnesium and iron. Basalt and gabbro are examples of mafic rocks.
The current record is held by Briton Corporal of Horse (CoH) Craig Harrison, of the UKâs Household Cavalry, who recorded a 2,475 m (2,707 yd) shot (confirmed by GPS) in November 2009, also during the War in Afghanistan, in which he hit two Taliban insurgents consecutively.
Picking off an insurgent in Afghanistan in March 2002 from a distance of 2,526 yards, Perry bested Carlos Hathcock's Vietnam-era record of 2,500 yards, but was quickly dethroned as the best long-range sniper by a member of his own team, Corporal Rob Furlong who made the second-longest shot in history, just weeks later.