I have to ask: You are aware that you have no idea what you are talking about, yet you felt the need to answer him? Can you explain why? This is an extremely common thing for people to do, so it is very interesting to hear (if possible) what your train of thought was.
I'm not sure that beating up on someone who decides to say that they aren't familiar with something and are retracting an earlier suggestion is a good idea. Seems likely to lead to people not retracting things even when they think that they might not be correct.
It's a fucking joke, mate. Me being European has nothing to do with my knowledge of firearms. A muzzle brake is a fair guess, so is a WWII-era heat sink. But, I guess you know guns better than I do, congratulations. You really owned me.
Suppressors tend to get very hot very quickly. This produces a mirage effect when looking through the scope. Wraps made of high temperature materials help mitigate that and also allow the shooter to remove the suppressor without having to wait until it cools down.
They are suppressors (a.k.a. silencers). They work just like your car's muffler and both were invented by the same guy: the grandson of the inventor of the Maxim machine gun.
It will certainly not make these monster guns movie-quiet but it reduces their massive sound and flash signature making it harder to locate where they were shot from.
Certainly looks that way. As if it wasn't big enough already. In most pictures I have seen they have only muzzle brakes, but in some they clearly have suppressors. A useful side-effect may be to reduce the visible muzzle fire for night operation.
"Silencer" is the older and frankly BS term. Silencers don't silence anything outside of video games and movies. They more "suppress" the noise and muffle it a bit.
Basically it's the difference of firing it outside and having your ears ring forever or just for a long time