First of all he doesn't use a Walther PPK at the end of the movie he uses a Walther P99 which is a 9mm and has more firing power. Second the silencer is only used to muffle the sound of a gunshot not eliminate it completely. Since the gun is of higher velocity it sounds like a gunshot but its not.
A silencer's purpose is to muffle the gunshot to the point where it won't be recognized as a gun firing by anyone who DOES happen to hear it.With a well-silenced 9mm,all you would hear is the pistol's operational noises (i.e. slide,going back and fourth,bullet casing hitting the floor),AND a muffled 'POP',or maybe 'CLACK'.It's hard to describe the noise they make.And in the case of a silencer being 'Loose',as the original author put it,the silencer would most likely bust if the operator fired with the suppressor not fully screwed on,because the barrel wouldn't be in-line with the can,and the bullet would come in contact with the baffles and permenatly damage the silencer.Hope this helped all of you on this suject!
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