The O'Brien V.113 Gravekeeper has 900 HP and is disabled under 30% health. It has "Light Armor" resistance: it can soak small arms fire and shrapnel, and it is immune to Flamethrowers. But it won't last long when faced with 12.7mm machine guns, heavy explosives, or anti-tank weaponry. It has Tank Armor. With it, in best case scenario, penetrating projectiles only have a 85% chance of penetrating and doing damage. That chance goes up quickly if the armor is worn or if it is shot from up close, or on the side or rear from a direct angle, or with ammo that has penetration bonuses. It takes 115 Basic Materials to fully repair it from 1% to 100% health with a Hammer. Its health and Tank Armor can be instantly repaired at a Garage for 100 Basic Materials.
The O'Brien V.113 Gravekeeper, like all wheeled armored cars, is a lightly armored car, but it is designed to combat enemy armored vehicles. In terms of mobility, it has mediocre off-road speed and decent on-road speed, which makes it limited to where it can effectively fight. Along with its slow-turning turret, it is better to stay on roads so the crew can react faster if they're being flanked. Additionally, due to its low health, a single anti-tank mine will nearly destroy it.
The ARC/RPG is a slow-moving projectile and thus travel time must be taken into account when shooting at moving targets.
Due to its small ammo capacity, it must resupply often, which limits its effective combat range. Its advised to have a nearby supply of shells, as well as make sure the rounds fired hit enemy vehicles.
Similar to all armored cars, as soon as heavier anti-armor weapons become more common, (such as anti-tank rifles) the O'Brien V.113 Gravekeeper loses most of its relevance on the front line, as they will quickly be destroyed, as longer ranged weapons prevent the crew from reacting fast enough before being destroyed. However, due to its armament, it is still a formidable opponent when operated by a competent crew.