Patent ID: 8096073

Claim:
A firearm comprising: a barrel; and a whistle, wherein the whistle comprises a barrel port, a channel, a whistle port, a channel block, and a chamber, wherein when the firearm is discharged a bullet traveling down the barrel forces air through the barrel port, the channel, and the whistle port to cause a whistle sound, and wherein the channel block partially constricts the channel at a position approximately between the barrel port and the whistle port, and wherein air traveling within the channel is compressed at the channel block, and wherein the chamber is a cavity continuous with the channel at a position approximately beyond the whistle port, and wherein at least a portion of air traveling from the channel collects within the chamber and at least a portion of air traveling from the channel is forced through the whistle port, and wherein the barrel port provides an angled extension of the barrel cavity with the channel.