Yeah, just pointing out that a suppressor doesn’t affect the bullet sound. If it’s supersonic, it will still crack.

The can just gives the explosion (gunshot) time to expand and slow down. I am intimately familiar with this concept and have a nearly silent build myself.

Edit: sidenote, if you want to shave off a few more decibels from the noise of the shot, add a small amount of material to ablate inside the suppressor. A VERY small amount of water will do in a pinch but petroleum gels are better. I personally recommend a cleaner gel like medical ultrasound gel, very clean and very effective.