Re: The Future of Small Arms
I'm gonna go out on a limb here and say that I don't believe directed energy weapons will EVER be as popular as slugthrowers - in atmosphere.
Atmospheric scattering will be a great bugaboo for lasers, particle beams, and plasma casters for the forseeable future. If you have the energy density technology to overcome that in a hand weapon, you have the capacity to project a nuclear detonation equivalent at your targets from a vehicle - hand weapons cease to be a valid concept.
I figure railgun and coilgun technology is maybe 15 years away from weaponization, at least as vehicular weapons. Electrothermal is maybe ten years after that - it would require some breakthroughs in materials technology to make a safe ECT firing chamber.
Incidentally, I also don't believe in caseless ammo for a chemgun. ECT requires a case; conventional rounds are cheaper and easier to build with cases (note that the "next generation" AR by H&K, the G11, which used caseless rounds, died due to lack of interest); and you can make a lot of fancy rounds with a case that you can't without one. Caseless ammo is a solution looking for a problem.