Syllogy, on 27 March 2013 - 01:31 PM, said:
That's reductio ad absurdum and you know it. The only similarity between the M16 and the Gau-8 is the way that the rounds themselves work.
The M-16 is an Air-Cooled, Gas Operated, Magazine-Fed Assault Rifle. The GAU-8 is an Air-Cooled, Hydraulically powered, Belt-Fed Vehicle Mounted Weapon.
They aren't anything alike.
The principals of Coil vs. Rail are exactly the same.
Actually, the principals are very different. The motive force is the same; as is the type of projectile, and that's about it.
Coil guns require either a charge-up time, or a constant charge being held; it achieves its goal by shutting coils off as the projectile reaches them. The projectile does not touch the coils.
Rail guns can be fired virtually instantaneously, but require the projectile to be touching the rails; it is fired simply by applying current to the rails; they are not powered otherwise.
My comparison is exactly the same as yours; the projectile and motive force are similar; the mechanics are different.