Yes, practically any miniatures can be used - I've seen games played with AMT/Ertl Star Trek models on a basketball court as the board! - But one thing about FSA ships, they are larger 'scale' than the usual FT 'scale'. My solution for using them with the usual scaled ships such as Ground Zero Games ones is the same as for BFG ships in the game; Consider them one classification larger than advertised for their original setting. So, Frigates move up to Destroyers, light Cruisers move to Heavy Cruisers, and Battleships become Dreadnoughts.