Historical information
QCB stands for quick change barrel and relates to a heavy Browning Machine Gun. This manual set up for training course on it's use and function.
Physical description
Stapled assembly A4 sheets with green cover and with 42 pages of the use, description and maintenance of a Browning 12.7mm M2 Heavy Quick Change Barrel (QCB) machine gun.
Inscriptions & markings
Date, "November 2004" then "1/2/2005".