Hi James, welcome to the forum.

Your weapon looks pretty impressive. My robot Neophyte is approx 200mm tall & is one of the bigger FW's so you should have a big enough bite for most opponents.

I'm no expert so I can't tell you how effective your weapon will be at piercing armour but I do know that most robots use HDPE for top armour so you should have enough power to at least get a good grip.