10 of the most common sound supressors I've used over the years for varios projects.
The term "silencer" is most common but it's kinda misleading.
They don't actually silence the weapon completely.
They do make an enormous difference in ouput volume tho.. especially if you use a sub-sonic ammo.
(Just don't go firing repeated like the games and movies. The can and do burn out. Never touch one after firing either. Even if it's not red hot it can still burn TF outta ya... lotta noobs fall for that one.)