This article is timeless and should be accurate for any version of the game.
“
An advanced variant of the Universal Assembly Rig, the BMS - Fabricator is fitted with a unique kit designed to handle advanced or specialized construction and excavation jobs.
„
— In-game description
The BMS - Fabricator (also known as an Advanced Construction Vehicle, or ACV) is an extremely slow logistics vehicle specially designed to build, rebuild, and upgrade large Structures (including certain player-built ones). It's visually distinct from the BMS - Universal Assembly Rig by its black chassis.
The BMS - Fabricator has 1000 HP and is disabled under 75% health. It has "Unarmoured" resistance, even small arms fire and Flamethrowers are a danger to it. 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.
Interactions
Can interact with most structures in proximity - press E or Shift + E
Pulls items from stockpiles twice as fast compared to on foot
Can pull three times the normal amount from stockpiles - press Shift + LMB
Its construction arm can build, rebuild, and upgrade certain structures - press/hold LMB
Required materials must be in its inventory
Can build, rebuild, and upgrade everything that a Construction Vehicle can.
CVs and ACVs build faster than a player with a hammer at a rate of 2 materials per second, with multiple ACVs able to work on the same blueprint. As such they are an important tool for constructing defenses or structures in a timely manner, which also makes them a nice target for Partisans and enemies. When near the front, it is advised for ACVs to be escorted by infantry so they safely arrive to their destination, as they will help construct larger defenses (such as bunker bases constructed during pushes into enemy territory) at a quicker rate, allowing pushes to be more aggressive
ACVs should ALWAYS be left unlocked when you are done using it so others can use them. Due to them not being able to be stolen by enemy infantry, their protection varies depending on the situation (ACVs are high-priority targets due to their relatively high production cost)
ACVs can still build even if they are damaged, however they will not operate if they are disabled. Like all Construction Vehicles, an ACV created by the enemy faction cannot be driven, however its inventory can still be accessed, allowing for Partisans to dump its contents.
For a more comprehensive, and detailed guide regarding building in Foxhole: