Door

Doors are essential to defend your Weapons, while still be able to fire them. They have similar caracteristics with Armour but can be opened.

Main use
You can use them to protect your weapons from enemy fire, they have the same HP as armour, making them able to tank some shots.

They are pretty expensive, meaning you need to spend a lot of Resources in order to make enough for all your weapons, especially if you're using lots of weapons.

Other uses
A common dooring technique is called "double-door", which is pretty much self-explanatory. You put 2 doors instead of one in front of a weapon, both will open simultaneously when you want to fire.

When late game comes, triple-doors might be needed, since heavy weapons come out and can destroy double doors if used correctly. Some players even go further after triple doors, making it hard to count but weak to splash.

The issue when using doors, is getting "door-sniped", using a sniper or another precise weapon, your opponent can destroy your weapon if you open your door at the wrong time. Top players tend to door-snipe very often, and try to lure their opponents by using other doors to bait them.