User blog comment:Owlfeathers0117/New RP Weapon Classification System/@comment-27797576-20150202190931/@comment-27797576-20150202212639

I normally go by bore size on mine. the actual length of it depends on the ship model. the narada level one will span the length(~2-3km) of the ship mount on the back by a swivel, IG acting like narada's crane.