Heavy Field Gun

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This article is considered accurate for the current version (1.54) of the game.

Armed with explosive 40mm rounds, the Smelter is perfect for engaging enemy armour. The frontal blast shielding providers operators with ample cover in heated skirmishes.
In-game description

The 40-45 “Smelter” Heavy Field Gun (also known as a Smelter or HV40) is a Colonial Heavy Field Gun equipped with a high-velocity 40mm cannon.

General Info


The 40-45 “Smelter” Heavy Field Gun houses a crew of two soldiers:

  • Driver (Left Side)
    • Operates on the left side of the chassis
    • Controls the movement of the vehicle - requires a soldier in the Gunner seat in order to move
  • Gunner (Right Side)
    • Operates on the right side of the chassis
    • Controls the reloading, and firing of the chassis-mounted 40mm main cannon
    • Required to move the vehicle

NOTE: Despite not having an actual Passenger seat, it is possible for a soldier to stand on the Spade (the long metal piece on the back of the vehicle) and move with the crew.

Unlike enclosed vehicles, Field Weapons cannot switch seats, requiring the crew to exit the vehicle in order to change seats.


The 40-45 “Smelter” Heavy Field Gun is equipped with one main armament:

  • High-Velocity 40mm Cannon
    • Mounted on the chassis (16 degree firing arc)
    • Ammo Used: 40mm
    • Reload Duration: 3 seconds per projectile
    • Range: 45 meters
    • Fire Rate: 15 per minute
    • High velocity barrel increases damage by 35% (810 damage)
    • Reloading immobilizes the vehicle


It has a dedicated ammo slot that can hold 40 40mm shells.

Health & Armor

The 40-45 “Smelter” Heavy Field Gun has 4000 HP and is disabled under 30% health. It has "Heavy Armor" resistance: it can soak small arms fire, shrapnel, and 12.7mm machine guns, and it is immune to Flamethrowers. But heavy explosives and anti-tank weaponry are a real threat to it.
Despite its heavy armor, the vehicle doesn't have Tank Armor and thus can never deflect penetrating projectiles.
It takes 100 Basic Materials to fully repair it from 1% to 100% health with a Hammer. Its health can be instantly repaired at a Garage for 100 Basic Materials.


  • Can be towed by certain vehicles
    • Hitch and unhitch the towed vehicle via the Shift + E interaction menu (the two vehicles must be very close and you in between them).


Structure Input(s) Output Time
Small Assembly Station (Field Station) 5 x Processed Construction Materials ProcessedConstructionMaterialsIcon.png
5 x  Assembly Materials IV AssemblyMaterials4Icon.png
2 MW of power ProductionPowerIcon.png
1 x   AA-2 Battering Ram AA-2 Battering Ram Vehicle Icon.png
 40-45 “Smelter” Heavy Field Gun 40-45 Smelter Heavy Field Gun Vehicle Icon.png 00:05:00

Must be fully researched in the Vehicle IconFilterVehicle.png Tech Tree in order to be produced.

Storage & Transport

The 40-45 “Smelter” Heavy Field Gun can be stored in a Storage Depot, Seaport or Storage Ship.

It can be packaged into an small Shippable and transported by any Shipping Vehicle (Crane, Flatbed Truck, Barge, Freighter, Storage Ship, Landing Ships, Flatbed Car, or Large Crane).
It can also be towed by certain Trucks and Half-Tracks.


The 40-45 “Smelter” Heavy Field Gun's strength lies in its versatility and being able to attack both vehicles and structures, with the fast reload time allows it to out-damage various tanks. The best way to utilize this push gun is to have someone spot with binoculars every so often to look for targets. If they spot an enemy tank, they should call out to the crew and advance towards it.

Once the tank is near, it's important to keep the range of the weapon in mind, as it outranges most tanks by 5 meters. This allows them to hit the enemy without fear of retaliation. Shooting at max range can easily scare off most tanks as the damage of the cannon is pretty high. If unable to destroy the target, the crew could retreat, depending on given situation is too dangerous for the push gun.

All push guns, by their nature, are one of the most vulnerable vehicles in the game in terms of crew protection. They are exposed to the enemy, making them susceptible to all enemy fire. Due to push guns requiring both crew members to move them, the death of a single crew member could result in the push gun being lost. Due to this, it is recommended to only lock the gun when it looks like enemy infantry are going to overwhelm you and can steal it. This tactic is vital if a push gun is decrewed, as it allows a friendly soldier to quickly man it and drive it back to safety.

Visibility Mechanics
Push guns have a visibility mechanic, which allows it to operate differently compared to regular vehicles. Similar to infantry, they are affected by vision, meaning their movements cannot be seen unless it is within your line of sight. Due to this, they can hide behind structures, or even bushes (depends on how big the bush is). It's also affected by the time of day, with nighttime making it possible for push guns to become invisible to the enemy if you're far enough from them. Keep in mind that if the enemy decides to illuminate your position, this will expose it until the flare dies out. The push gun's position will be exposed anyway if the crew decides to fire its main armament.


  • Prior to Update 1.50 ('Inferno'), the 40-45 “Smelter” Heavy Field Gun used to be called the "68-45 'Smelter' Heavy Field Gun" and fired 68mm shells with a significantly higher HV bonus (with less damage than a 75mm round).
    • It was later changed to fire 40mm shells, along with its HV bonus drastically reduced.