How Silencers or Suppressors Function on a Firearm
How Silencers or Suppressors Function on a Firearm
First Silencers ( Suppressors ) are Prohibited devices in Canada:
How Silencers or Suppressors Function on a Firearm In Canada, a device to muffle or stop the sound of a firearm is a “prohibited device” under the Criminal Code. A prohibited device is not inherently illegal in Canada but it does require an uncommon and very specific prohibited device license for its possession, use, and transport. Suppressors cannot be imported into the country by civilians. See http://laws-lois.justice.gc.ca/eng/regulations/SOR-98-462/FullText.html
Second here is a rundown on:
A silencer screws on to the end of the barrel and has a huge volume compared to the barrel (20 or 30 times greater). With the silencer in place, the pressurized gas behind the bullet has a big space to expand into. So the pressure of the hot gas falls significantly. When the bullet finally exits through the hole in the silencer, the pressure being uncorked is much, much lower. Therefore, the sound of the gun firing is much softer.
Bullets that travel at supersonic speeds cannot be silenced because the bullet creates its own little sonic boom as it travels. Many high-powered loads travel at supersonic speeds. The silencer can remove the “uncorking” sound, but not the sound of the bullet’s flight.
Third:
A suppressor, sound suppressor, sound moderator or silencer is an accessory device that is attached to or part of the muzzle of a firearm or air gun’s barrel and reduces the noise signature (muzzle report) and visible flash generated by the gun’s firing. Suppressors are typically constructed of a metal cylinder with internal baffle components to slow and cool down the escaping propellant gas and thus decrease the sound intensity of the muzzle blast. A flash suppressor, on the other hand, specifically coolS or disperses burning gases typically exiting from the muzzle of a carbine-length firearm, without reference to sound reduction.
In most countries, suppressors are regulated by firearm legislation to varying degrees. While some have allowed for (or even mandated) sporting use of suppressors (especially to mitigate the costs of hearing loss and noise pollution), other governments have opted to ban them from civilian use.
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Eric Beer | BC Firearm Academy
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