Two raiders peered at the demolished remains of a wartime armored personnel carrier. Inside their prey had taken shelter. Two mares had sought refuge inside the carcass of the former vehicle. Even after 200 years the armored sides of the APC resisted the raiders projectiles.
There was a third mare who was annoying the raiders with her rifle fire from behind a ruined brick wall.
It started out as a Lee-Enfield rifle, but modified to .45 ACP with a Thompson SMG barrel, and it uses magazines from the M1911 pistol. The barrel was ported just behind the muzzle to provide a slower, more controlled release of propellant gasses, and fitted with an enormous suppressor much longer than the barrel, with a complex spiral baffle design. It was made to be as quiet as possible, regardless of bulk or weight.
We’ve learned a lot about the behavior of high pressure gas flows and suppressor design since 1942, but not many modern suppressor designs are quieter. The modern designs are smaller, lighter, less bulky, and easier for an end user who may not be a trained armorer to disassemble and clean. But not quieter.