Here are some arms for Slot Bot.  The first one is basically a slab of iron on a steel cable that would spin around and smash stuff, but could also be wound up and thrown and reeled back in.  Next to the right is a fan chain saw weapon.  It's basically 5 chain saws lined up like a common ceiling fan.  Unnecessary?  Yes.  Middle left is the standard arm, it allows grabbing, punching all the fun stuff one can do with an arm. To the right of that is a cannon.  It's pretty devastating and would probably be the highest difficulty armament.  Bottom left is a shock gun.  It jolts out a low voltage spread of electrical currents that do little damage but has a large hit box.  Lastly is the Nerf weapon, a stuffed bunny head puncher.  Obviously the least effective of the bunch and what one hopes to be going against.

The illustration of Slot Bot is shown with the standard arm and shock gun.