Read
(e Book - English - Military) US Army - Field Manual FM 3 22 27 - MK 19, 40 Mm GRENADE MACHINE GUN, MOD 3 Nov2003
FM 3-22.27(FM 23.27) MK 19, 40-mm GRENADE MACHINE GUN, MOD 3 NOVEMBER 2003 HEADQUARTERS, DEPARTMENT OF THE ARMY DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited.