"The sled is particularly weak against "Gattling Guns/Gallaghers," to be precise the Doom Hunter's sled get's destroyed after about a second's worth of fire from the Combat Shotgun's "Fully Automatic" Mod, which turns it into a Gallagher and the Chain Gun's "Mobile Turret" Mod." I have no idea what a Gallagher is, and even after google searches best I could find is the Gallager carbine.
Could someone explain what the original writer meant ?