Handbook of the Colt automatic machine gun, caliber .30 with pack outfits and accessories Machine gun manual : a complete manual to machine gunnery containing details of Maxim Vickers Lewis Colt Hotchkiss together with Drill (elementary and advanced) : … Handbook of the Colt automatic machine gun model 1919, Colt automatic machine rifle model 1919, Colt aircraft machine gun model 1919