The errata says this about mounting physical weapons on hand held weapons.
Alternatively, a single arm-mounted BattleMech physical weapon may be installed instead, so long as it does not have weight, damage values, or other effects reliant on the weight of the unit carrying it. Shields or Spikes are forbidden.
That would be the Chain Whip, Flail, and Vibroblades? Right?
Would that also include the Chainsaw, Combine, Dual Saw, Heavy Duty Pile-Driver, Mining Drill, Spot Welder, and Wrecking Ball from TechManual, right?
I'm guessing hand held Lift Hoists are out. Right?