[DonRotolo]

I think the key word is "Mechanism" - look at First's definition for that.

"MECHANISM – A COTS or custom assembly of COMPONENTS that provide specific functionality on the
robot. A MECHANISM can be disassembled (and then reassembled) into individual COMPONENTS without
damage to the parts."

Seems to me that the barrel or whatever would be a part of the 'machanism'. So the answer would be no, that wouldn't be allowed (my opinion).

Don