These systems are commonly used among all types of combat power armor. However even a utility drone unit
could at one time or another need a "weapon" as per say such as perhaps vibro axes or pick axes (heavy digging),
power saws, ect. Granted, you are not going to see a construction unit carrying a Rapid Fire Field Gun or Rail Gun!
There are several different types of weapons and are devided into Melee Weapons, Heavy Power
Armor Weapons, Beam Weapons, Rockets and Missles, Anti-Personelle Weapons, and Backblast Packs.