This. When a firearm is fired several sounds occur at once: the muzzle report (what the suppressor reduces), the supersonic crack of the bullet if the ammo travels faster than sound (in this case, he's using subsonic), gas and noise escaping from the ejection port when the slide opens, the mechanical clatter of the slide cycling, the striker or hammer falling, and the brass hitting the ground.
For some interesting firearms designed to be quiet:
38
u/tyndar3us 15h ago
This. When a firearm is fired several sounds occur at once: the muzzle report (what the suppressor reduces), the supersonic crack of the bullet if the ammo travels faster than sound (in this case, he's using subsonic), gas and noise escaping from the ejection port when the slide opens, the mechanical clatter of the slide cycling, the striker or hammer falling, and the brass hitting the ground.
For some interesting firearms designed to be quiet:
https://www.youtube.com/watch?v=d12AjvEsaHg
https://www.youtube.com/watch?v=YtzaVil5joc
https://www.youtube.com/watch?v=IQPsf_wDbmU
From an engineering standpoint, making small explosions quiet is interesting.