What are your computer's specs? My old laptop (~4 years old) handled the Uber-Weapons just fine.
I have multiple computers, I will tell you the specs of the computer I use to play games like Blockland (Pre v21)
Intel Pentium 4 (Unknown Version WTF?, I'm guessing this is the Dual Core version)
2GB DDR2 Ram
Now this video is a budget card I got, its not great at all but I just got it December 2011, at least it runs all source engine games on high with 4x AA.
For some reason it makes Blockland run like stuff with shaders on high while it can run games like HL2,GMOD,TF2, and various other games on High at 60HPS.
NVidia GeForce 210
Its a budget card once again so you know its not that great, I have better cards on my other computers but not the one built for Blockland, I have to upgrade it to run v21 better.
I still don't understand why Torque doesn't render that many weapons on my comp well, I never lag, but when I stare at about 32 uber weps I lag, Like I said earlier I'm guessing it may be a Torque issue about rendering weapons, but Content Doors usually have more Polys so I'm in a stump.
Also this is a Tower Comp, I currently don't have a laptop to run Blockland on.