Or dual/quad 20mm... and the old dual 40mm. We have the last WWII LCS tied up and being restored over at Mare Island (former naval shipyard). With its 3”50 cal up front, two dual 40mm, several 20mm, a BUNCH of Ma Deuces and 2 81mm mortars, she has enough firepower to deal with any Zeta gangster! (LCSs were Landing Craft Support ships in WWII and saw a lot of action at most of our Pacific landings)
I even heard a rumor that the Ma Deuces are now built in Belgium, under license, and imported. I don't know if that's true, tho...