I really did think he was going to get his arms torn off ... However this really doesn't improve his situation,I mean what if Gantz doesn't fix his suit? ...
So the suit is pretty much an independent strong body itself. Enemies have to destroy it before they get to the real body. So we discovered one important aspect of how it works and its properties.
But at the same time something is really weird here, in the last mission of the statues some of those who died were wearing the suit and still got cut/got an acid attack and lost its limbs. Or maybe it's because the final boss statue had those weapons with special properties that could affect the body through the suit. That's the most plausible idea I can come up with.