The wheels are 61 × 6 inch with rubber tires and band brakes. Some older vehicles have steel tires and are fitted with tire brakes.
An armor plate shield is fitted to the carriage for the protection of the personnel.
The instruments for sighting and laying the piece included a line sight, a rear sight, a front sight, a panoramic sight and a range quadrant.
The line sight consists of a conical point as a front sight and a V notch as a rear sight. These are located on the Jacket of the gun, and are useful for giving a general direction to the gun.
4.7” Rifle
The sighting is similar to the 3”, 1902.
The rear sight and front sight are used for direct aiming. The rear sight is a peep sight mounted on a range scale quadrant by a bracket on right side of the cradle. The front sight is a pair of cross wires mounted in a ring attached by a bracket on the cradle about 3 ft. ahead of the rear sight.
The range scale quadrant has a socket in which the Standard U. S. Panoramic sight may be mounted.
For indirect fire the gunner on the left of the carriage lays for direction only.