just had a thought actually.
kan-opener has a locking bar on his claws right. Razer does not.

I am building at the moment both types, a vertical and horizontal crusher. so do i need it on one, both or neither?
they are featherweights.

I would say both, if I was the rule maker, but Im not, so please rule on this for me oh FRA master, and let me know if i need to make locking devices for them. Best practice says do it anyway, but id like a firm rule please.

Again, if I were the rule maker id say all active weapons must be physically locked in place, (so as to limit movement sufficiently so that it cannot move a distance likely to injure, pinch, or damage others (persons or property) under any circumstances) and unable to move, even under full power, when out of the safe arena but then I will simply follow what im told here.

(please note, this rule clarification may effect current robots aswell, so if you have an active weapon and no locking pin, pay attention)