I'm not going to keep arguing this, so now I need some ideas! 

My military is supposed to be made up of heavy cavalry (Night Mares, which hopefully you guys allow), a decent navy (albeit one that is as likely to rebel than to follow orders), a limited supply of quite good fighter planes, some big guns, and ranks of infantry with powerful guns. 

Obviously I don't have any tanks, or anything noticeable anti-tank wise, that's where my Reactor Rifles were going to make me even slightly competitive seeing as you all have militaries bigger than my entire population, so now I need ideas as to what technology is available to make powerful enough rifles to be strategically valuable. Any and all ideas are welcome! 

EDIT: Railguns maybe?