to answer your Question The Skill referred to here Used to actually have a weapon that went with it the weapon was Heavy weapons class {as far as i can remember} and DID a lot over 120 Dmg. I Only ever 1 time saw said gun in game and cannot remember its name. this was 3 years ago now at least. If i remember correctly
MA removed them to make Room for the Newer plasma Rifles at that a time Namely the Foxtrot and Tango Models.