Gun production, Col. William P. Barba.
Mobile field artillery, Col. J. B. Rose.
Railway artillery, Col. G. M. Barnes and Maj. E. D. Campbell.
Explosives, propellants, and artillery ammunition, Col. C. T. Harris and Maj. J. Herbert Hunter.
Sights and fire-control apparatus, Col. H. K. Rutherford and Maj. Fred E. Wright.
Motorized artillery, Col. L. B. Moody and Lieut. Col. H. W. Alden.
Tanks, Lieut. Col. H. W. Alden.
Machine guns, Col. Earl McFarland and Lieut. Col. Herbert O'Leary.
Service rifles, Maj. Lewis P. Johnson and Maj. Parker Dodge.
Pistols and revolvers, Lieut. Col. J. C. Beatty and Maj. Parker Dodge.