Are Arms, arms, if they are weapons?

[Damion Dorian Tarkin]

I know some of the rules on mech suits and stuff. Mostly being "If it has arms then no" But Both as a clarification, and seeing what others think I am asking if having an "arm" that is entirely a sword or cannon is allowed, or even considered an arm.

Like this
Or this for example

 

[John Locke]

Damion Dorian Tarkin

It it's piloted then it's probably a mech yes. Both of the examples you've shown would be classed under the mech category.