The Polonium K is made to be a quiet duty rated hard use 5.56 suppressor. It has a highly effective built in internal and external flash hider that offers superior flash reduction over the competition when using night vision or when shooting in low light conditions. The reputation performance and track record of the Polonium k speaks for itself. This suppressor has 10% more surface area depending on the length that will shed heat and cool down quicker. If you are looking for the best size weight and price to sound performance ratio on the market that you can beat the absolute crap out of then look no further than the Polonium series.