like breaking a broom handle over your knee. While it's not silent, it's a LONG ways from being as noisy as is an unsuppressed .22lr rifle, with regular, high speed .22 ammo in the latter. On an auto rifle, cycling normally, you can't hear it 1/4 mile away, on level, open terrain. In wooded hills, you can't hear it at 200m. That's PLENTY quiet enough to be well worth having on the rifle, believe that. With the .22 unit and subsonic lr ammo, you wont hear it at 50m, in thick woods, or over a hill, or at 100m, in the open, quietest, COLDEST night you ever experienced, COUNT on that.