The Vassago.
Use the HTL one.
Its in ASW 3.6.12
The version you're using has collision errors due to the ****ty MAX CONVERTER.
The HTL one is converted through Collada and has no such issues.
The original collision errors are my fault (for using the stupid converter in the first place), so I demand you fix it! I won't let my error run around like that!

Also, the HTL version doesn't have 2D polies on the forward guns.
Plus, its mapping is much less STRETCH (look at the "head part", ouch), and it has roughly the same shape/weapon config so it won't break any missions you made with it.
Let me assure you that it is in your best interest to change it.