A self-propelled gun is a gun, whether it be an artillery piece, anti-tank gun, or anti-aircraft gun, mounted on a motorized wheeled or tracked chassis. As such the gun can be manoeuvred under its own power as opposed to a towed gun that relies upon a vehicle or other means to be moved on the battlefield. Self-propelled guns are combat support weapons; they are employed by combat support units fighting in support of, or attached to, the main combat units: infantry and armour.

An assault gun is a gun or howitzer mounted on a motor vehicle or armoured chassis, designed for use in the direct fire role in support of infantry when attacking other infantry or fortified positions.

A tank destroyer, or a self-propelled anti-tank gun, is a type of armoured fighting vehicle. Tank destroyers are used primarily to provide antitank support in combat operations but do not fit all the criteria of a tank. They may mount a high-velocity anti-tank gun but have an open turret, no turret at all or run on wheels instead of tracks. Vehicles which carry a antitank guided missile launcher are referred to as ATGM carriers.

A howitzer is a type of artillery piece that is characterized by a relatively short barrel and the use of a comparatively small propelling charges to propel relatively large projectiles at medium velocities over a curved trajectory.

A half-track is a military vehicle with regular wheels on the front for steering, and caterpillar tracks on the back to propel the vehicle and carry most of the load. The purpose of this combination is to produce a vehicle with the cross-country capabilities of a tank and the handling of a wheeled vehicle.

Armoured personnel carriers (APCs) are armoured fighting vehicles developed to transport infantry on the battlefield. They usually have only a machine gun although variants carry recoilless rifles, anti-tank guided missiles (ATGMs), or mortars. They are not really designed to take part in a direct-fire battle, but to carry the troops to the battlefield safe from shrapnel and ambush. They may have wheels or tracks. Examples include the American M113 (tracked), the British FV 432 (tracked), the French VAB (wheeled), the German Boxer MRAV (wheeled) and the Soviet BTR (wheeled). More heavily armed and armoured are Infantry fighting vehicles, which are designed for direct combat.

An infantry fighting vehicle (IFV, also known as mechanized infantry combat vehicle, MICV) is a type of armoured fighting vehicle (AFV) used to carry infantry into battle and provide fire support for them.

An armoured recovery vehicle (ARV) is a type of armoured fighting vehicle used to repair battle- or mine damaged as well as broken-down armoured vehicles during combat, or to tow them out of the danger zone for more extensive repairs.

A laser range-finder is a device which uses a laser beam in order to determine the distance to a reflective object.

The high magnification sight is normally equipped with a graticule (or reticule). The graticule, which overlays the field of view, is a pattern of marks which can be used for alignment and gunnery purposes.

The canister round is intended for close-in defence of tanks against massed assaulting infantry attack and to break up infantry concentrations, between a range of 200-500 metres, by discharging large numbers of metallic balls from the main cannon.

The wheels bearing the weight of a land vehicle onto the ground or its own tracks.

Monocular sight is an optical system with a single objective lens and a single eyepiece. Biocular sight is an optical system with one objective lens and two eyepieces, in which the same image is presented to each eye. Binocular sight is an optical system with an independent channel for both eyes. Each channel has its own objective lens and eyepiece, so that the images presented to the eyes are slightly different.

It is a small wheel supporting the top run of the track.

In order to achieve the best possible strength, it is essential to have armour plate with the same hardness and structure throughout. The production of armour plate involves a rolling process to bring it to the correct thickness and to induce some desirable metallurgical properties. The expression 'rolled homogeneous armour' is used as a measure of the ability of a penetrator to defeat armour. Usually measured in millimetres, the rolled homogeneous armour can be used to assess one type of armour against another, i.e., spaced armour and monoblock (solid) armour.