If you mean firearm silencers they are not illegal "in the US." They are illegal in some states, but only a few. They are not illegal under federal law, but they do have to be registered with the ATF.
If suppressors for real guns are then most likely. since they're illegal in the US I'm guessing they are in Canada as well
It is illegal to add suppressors to airsoft guns.
While suppressors are illegal in Illinois, flash suppressors are not as they do not deaden or quiet the sound of a rifle in any way. "Sec. 24-1. Unlawful Use of Weapons" (6) Possesses any device or attachment of any kind designed, used or intended for use in silencing the report of any firearm
No, you are not allowed to use suppressors in New Zealand
Yes. You have to go through the standard federal process for suppressors.
Surge suppressors do work for your residence. They protect your GFIs and appliances. www.geindustrial.com
Suppressors can be mounted to the HK416.
Shooting Gallery - 2011 Suppressors 12-2 was released on: USA: February 2012
No, it is illegal to own or use a paintball silencer without an actuall firearm silencer permit. You can buy mock suppressors, which look like silencers but do no significant effect for sound dampening.
Suppressors are legal, yes.
yes
sorry- no. Illinois law does not permit the possession of many firearms, such as full automatics, and does not permit possession of suppressors. See 720 ILCS 5/Art. 24 in the Illinois criminal code for more information. 2015 there are separate bills in both the house and senate which would legalize suppressors in IL. Call your reps and encourage them to support them.