Derek Icelord, on 27 June 2012 - 07:58 PM, said:
Possible, yes. Practical, no.
On the 50 ton chassis, the Gauss Rifle takes up 12 tons and the PPCs use 7 tons each. Without downgrading the engine to a lighter (but slower) rating or shelling out the C-Bills for an XL engine or Endo-Steel internals, you're left with only 2.5 tons. This is with no extra heat sinks or any armor at all. Oh, and no ammo for the Gauss Rifle, which is another ton for every 8 shots.
Upping the Engine to an XL version of the same rating (i.e. no drop in top speed) and converting the internal structure to Endo-Steel, you've got 9 tons. This is still with no extra heat sinks, no armor, and no ammo. There aren't enough critical slots to convert to Ferro-Fiberous armor. You're also over double your heat sink ability to dissipate.
Inner Sphere gauss rifle is 15 tons, not 12.
You can easily do a gauss with 24 shots, 2medium lasers, and an ECM without endosteel, DHS, or XL engine. IF you upgrade to endosteel, DHS, an XL 200 rated engine, and drop the ECM, you could upgrade those medium lasers to a pairs of large lasers instead, and you'd still have your original 10 tons of armor. And I think you have the crit slots for it. But I wouldn't recommend ER lasers due to the heat, since you'd only have 10 double heat sinks.