Alright, so at the moment armories are kinda useless. Any class can just walk into a rax, switch to engi, drop ammo, and switch back. So my suggestion is: Remove armory altogether. Instead create a new building: The Bunker. The bunker would have alot of hp. There would be a health crate and a ammo crate inside it. Also, anyone inside the bunker would automaticly get their ammo refilled( over time). There would be one entrance, and peek holes that you could shoot out from. And anyone inside the bunker would recive a defencive bonus aswell as being able to "mount" their guns, meaning that they would lose mobility but be able to shoot with accuracy as thou they were laying prone. The bunkers would act to make defence easier, but being vulnerable to grenades thrown in due to the confined space.
i personally like the idea of pillboxes, but just making some gun holes in the armory would be fine for me
I think either solo or dizzy said they were working on this a while ago. Yes, dizzy did: http://forums.empiresmod.com/showthread.php?t=5704