Quiet pistol?

[Brimfire]

CP1 (.177) with a SAK moderator is seriously quiet.
In fact, it was too quiet and lacked the sensation of actually firing so I fitted an old Harper Classic Guns .25 job that I had lying about and now prefer the muted noise to the silence.

[Hsing-ee]

Easily the quietest air-pistol I have owned is the Weihrauch HW70. The power is not high, but as it is a springer it makes it easier to shoot. Excellent trigger and sights; the grip is a bit slippery but that's not difficult to fix.

If you have the money and you can find one, the Walther LP53 is also a quiet pistol. Anything with a big blast of gas or air is going to make a bang, so really SSPs, CO2 and PCPs aren't going to cut it unless you fit a 'orrible sound moderator.

[Markmelesky]

Easily the quietest air-pistol I have owned is the Weihrauch HW70. The power is not high, but as it is a springer it makes it easier to shoot. Excellent trigger and sights; the grip is a bit slippery but that's not difficult to fix.

If you have the money and you can find one, the Walther LP53 is also a quiet pistol. Anything with a big blast of gas or air is going to make a bang, so really SSPs, CO2 and PCPs aren't going to cut it unless you fit a 'orrible sound moderator.

Daisy 700 series, SSP Quietest of the 100 or so pistols i have.

[Chewy]

My Beeman HW40 clone isn’t too noisy. I do short range target shooting with it in my garage, and the noise doesn’t bother my wife and kids. That said, I designed and 3D printed a silencer for my wife’s Ratcatcher XL and have been thinking of how I could do something similar for my pistol.

EDIT - Just had a little play around with the HW40, and I can't see how you could fit a silencer without it fouling the trigger guard. I suppose you could use a push-in silencer that was a tight fit into the muzzle break, but you would need to remove and refit for every shot, and I can't advise trying to fit a silencer to a loaded and cocked pistol for obvious reasons!