Complexity Dev blog - Clockwork bot-guards and their beacon.
Clockwork Technomancers and Clockwork Juggernauts can summon these by default. They're Hell's answer to your beacon marine buddies. They use most of your weapons (outside of the big stuff) and a couple more types you can't. They throw grenades, and they punch at close range. They blow up when you kill them. The beacon will be placed in the zombie slots (zombieman/shotgunner/chaingun) and summon up to 4 of these guys at once before they detonate.
Now sounds for now, since my sound guy is still without PC.