The Armory in Claiming Cosmos is unique: one per player. Each upgrade is a stronger weapon age, then mines at level 4.
One shed per captain. That is the rule. Every time you advance the Armory, you get stronger — ballistic, electromagnetic, nuclear, energy, then plasma.
One per player. Unique. Each upgrade is a stronger weapon age. Level 4 unlocks Naval Mines. Costs $500k / $1.5M / $3M then $2M. Upgradable. About 8 seconds to build.
Back to the building list or pick a map like Sol System and play Claiming Cosmos in the browser.