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Vented barrel surrounded by metal mesh packing in expansion chambers, followed by conical baffles in forward chambers The suppressor is typically a hollow metal tube manufactured from steel, aluminium, or titanium and contains expansion chambers.This device, typically cylindrical in shape, attaches to the muzzle of a pistol, submachine gun, or rifle.The barrel has openings or "ports" which bleed off gases into the chambers.This type of suppressor is part of the firearm (thus the term "integral"), and maintenance of the suppressor requires that the firearm be at least partially disassembled.For these reasons, it is difficult to completely silence any firearm, or achieve an acceptable level of noise suppression in revolvers that function under standard operating principles due to the looser gas seal between the barrel and the cylinder.Some revolvers have technical features that enable suppression and include the Russian Nagant M1895 and OTs-38 revolvers, and the S&W QSPR.In order of importance, the three ways a firearm generates sound are: A suppressor can only affect the noise generated by the two primary sources – muzzle blast and sonic boom – and in most cases only the former.While subsonic ammunitions can negate the sonic boom, mechanical noise can be mitigated but is nearly impossible to eliminate.

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.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.American inventor Hiram Percy Maxim, the son of Maxim gun inventor Hiram Stevens Maxim, is usually credited with inventing and selling the first commercially successful models circa 1902 (patented March 30, 1909).Some "can"-type suppressors (so-called as they often resemble a beverage can), may be detached by the user and attached to a different firearm.

Another type is the "integral" suppressor, which typically consists of an expansion chamber or chambers surrounding the barrel.A flash suppressor, on the other hand, specifically cools or disperses burning gases typically exiting from the muzzle of a carbine-length weapon, without reference to sound reduction.