Many arguments could be made about how absurd it is, but the reality is that, well, reality doesn't have that much of an impact in a world where missiles can only fly about 1 km and 100-ton walking tanks exist.
That being said, it irks me that double heat sinks don't fit in the legs. The legs are simply the perfect and logical location for heatsinks from a realistic viewpoint (yeah, I know that doesn't matter), but oddly double heatsinks can't be installed there. I assume it's this way in tabletop Battletech, though I've played that very little over the years.
Ideally, one could choose between ammo in the legs or heatsinks, with the heatsinks there granting extra cooling when standing in water on or snow. That way, there would be a bit of a choice as to what to put in the legs. Right now, there's simply no other logical choice but ammo - double heatsinks wont' fit there, no modules have leg hardpoints, nor are there any leg-mounted weapons.
Edited by oldradagast, 05 April 2013 - 05:39 PM.