You really had to ponder?
Gatling-armed quadracycling Pinkertons in the 1890s! A 1938 Nottingham and District Ice-Cream Workers' Militia! Mrs Dunwoody's 1923 Anti-Eldritch Monstrosity Pulpinator! Any or all or fewer or more of these things can be yours!
I love the madcap brilliance of it, and that photo is just life imitating art a bit too closely for my liking. Don't give barmy people real guns...