Generally, you use suppressors with subsonic rounds to eliminate the muzzlecrack, this leaves only the sound of the action which in itself, is quite noisy. Though that funky russian revolver with gas sealed rounds was near-silent due to the above methods and with the quiet revolver action.
But yes, even the best silencers will only turn it into an ambiguous thumping, like someone punching a pillow but louder.
Shotgun silencers do a pitiful job, this is why few, if any exist.
Am I the only one who thinks real-life dirt cloud grenade explosions are so much more cool looking then fireballs?
No I <3 them too.