a revolver where the cylinder and its surrounding frame is an old fashioned silver alarm clock
A 2 bore revolver. Because recoil is something we don't understand too well.
DO something like a modern panzershreck.
the 2-bore revolver is approximately the size of a large rifle and releases so much pressure and heat
backward that- regardless of recoil- your hand is in danger of being literally blown off, thus the shield. it is one of those things where someone decided to blow a bunch of money on making the biggest, stupidest, most impractical but simultaneously raddest forgetin thing ever