Yo, gun enthusiasts! Ever heard of the “Swedish K”? It’s not your average Joe submachine gun, especially not the ones that went undercover in the ’60s and ’70s. These bad boys were souped-up with a built-in suppressor, taking a page out of the OSS’s WWII playbook. Forget about slapping on a silencer; these Swedish Ks had a tricked-out barrel that vented gases into a chamber packed with mesh rolls and discs. This setup chilled and slowly released the gases, turning down the volume on each shot to a whisper compared to your standard 9mm bang. Now that’s what I call a stealthy piece of Second Amendment history!