A silencer is to gun croed what loud exhausts are to thewtuning crowd. Not adding anything to the product but a stupid shiney cool thing to distiguish oneself from people outside the "educated" circles.
The safety device protect your hearing while shooting goes over your ears, or inside them. Not inbfront your mizzle. But hey, I guess operator style tacticoolness beats everything.
Anyway, gun safety pratices seem to be desperately lacking in the US, judging by all the stupid gun accidents. At least your hearing was protected by a cool, tactical device.