Well, just watching layer cake and it got me thinking, in films, when ever people have moderators on there rifles/pistols they have a sort of thrut noise. Are such moderators actually in existence? or is it just in films? Is it a case of such things not being available to the public for the obvious reasons of the danger they could pose? if they got in to the wrong hands. Bit of a silly thread I know so please forgive me but its just a bit of interest and light hearted.