How do you classify a Pneumag?
I've been engaged in a friendly debate on Pbnation with this guy about Pneumags (and I guess any other gun that uses pneumatics to trip the sear). He says he does not consider them to be mechanical guns.
My point is simply: There are no electronics in them, therefore, they are mechanical.
I don't really see any reason to differentiate them from simpler mechanical guns. Granted, they are in a league of their own in the speed department, but only because the trigger is lighter. They still rely on user skill to shoot them fast, as there is no circuit board to monitor half-trigger pulls and whatnot.
Furthermore, there are no eyes to prevent chops - you must rely on mechanical methods to prevent that.