They are magnetically based onto steel FOW-size bases which I ordered from here:
Highly recommend them, steel bases have a nice weight to them, he is happy to make custom sizes and delivered quickly.
I haven't got the photography right at this scale as they've come out a bit bright, especially the blue, which is somewhat less lurid in real life (Vallejo magic blue). I'm not set on the red visors, though they are a standout feature. Might try a different colour on batch two. They really need a coat of matt varnish, but I'm all out.
And this infamous smuggler captain and his first mate were among the freebies GZG were giving out at Salute.