BlueSeal8 gives us a quick overview of the KAC Airsoft Suppressor which he says works best with HPA powered airsoft guns... "This is an overview of the 5KU brand Knight's Armament Suppressor. I bought this suppressor a long time ago, and I realized there weren't any extensive overviews of this specific model. It is foam filled, so if you run a HPA (high-pressure air) airsoft gun, it can silence your shots!

I bought it for around $30, but prices vary online. Check out shootercbgear.com, JKarmy.com, and ebairsoft.com to try and find some in stock. If you have no luck there, look around on various Facebook airsoft groups, but be careful and don't get Zucked!"