system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a gun silencer work?
gpt
Ever open a soda can quickly and hear a pop?  If you have, then you've no doubt tried opening it slowly and noticed that it's a lot quieter -- it just sort of hisses.

This is fundamentally how silencers work.  The barrel in the silencer has a bunch of little holes that bleed gas into the body of the silencer.  Inside the body, there are lots of little pannels that slow the gasses down, so that when the bullet exits the silencer, there's not much pressure left behind it.  Because of inertia, the bullet is still travelling very fast, although noticeably slower than without the silencer.

It's important to understand that silencers only get rid of muzzle noise.  You usually want to use special ammunition that doesn't go faster than the speed of sound, or the sonic boom from your bullet will be very noisy.  It makes a long crackling sound.