The powerful ones have such high muzzle velocities that the pellet is supersonic and it cracks like a regular rifle. It makes is hard to pick off a few varmint in the city without letting your neighbors know. I’ve heard a few around us.
>>The powerful ones have such high muzzle velocities that the pellet is supersonic and it cracks like a regular rifle. <<
Tape straws to the sides of the barrel, then slip a condom over them and the front sight and it’ll quiet down considerably.