History of the Browning .50 Caliber M2 machine gun written by Fred Zeglin adds to the reprint of these training manuals. Original manuals were prepared for the Ordnance Department during WW II. They were used for training courses for armorers and gunners respectively. This reprint contains two publications. The first and larger of the two was designed to aid in training armorers. The second was a much smaller format and was used to train gunners with very similar information in a condensed form. Both books have become collectable among fans of the Ma Deuce. Anyone who loves history or has an interest in the tools that helped win the second World War will enjoy these books. Lots of illustrations add to the value and interest as well.