[iuhjyftgrd]

That's their main use

With a missile coming toward you at Mach 2-3 you don't want to be shooting subsonic cannon shells at it.

The rail gun ammunition is much smaller so you can carry much more of it and make a much more mobile gun turret because it doesn't need to store tonnes of shells or have a feed back to a magazine.

[Estragon]

But if you look at the video, it's clear they're a long way from making any kind of agile turret out of this. It's HUGE.

[scdlbx]

It is not that big compared to the guns on a destroyer or a battleship. It is still large and bulky, but not that far off.

Current destroyer's gun: http://en.wikipedia.org/wiki/5%22/54_caliber_Mark_45_gun

Iowa Class gun: http://en.wikipedia.org/wiki/16%22/50_caliber_Mark_7_gun

[tsotha]

Yeah. The part of the turret you can see when you look at the ship is only the tip of the iceberg.

[tsotha]

They'll be able to hit incoming missiles, but the primary strength of the system is as long-range artillery for land attack. It won't have the rate of fire you'd need to defend yourself against multiple incoming missiles.