Small-Scale Coilgun

[Nuke]

Yes, coil guns need to be capable of delivering very high power for a short time.

However, for this application, this MOSFET would probably be more than enough.

It is rated for 60 V and 30 A continuous current. Also if you look at absolute maximum ratings, you'll notice that pulsed current goes up to 128 A. That's more than 7 kW.

In any case, it's not the MOSFET that's the weak link here. Entire wiring needs to be capable of supporting that current, not continuously, obviously.

Also, looking over the internet, some use thyristors or IGBTs instead of MOSFETs.

if you go with igbts dont forget to use a flyback diode in reverse bias, otherwise the energy stored in the coil can fry your electronics when you switch it off. you dont have to do this with mosfets since they have an intrinsic reverse biased diode.