I have a Saker 556 and a Saker K, as well as an Omega. All great cans with great tone on 5.56 guns. I run the K on everything 12.5" and above and the 556 on my 11.5" and shorter guns. The Omega gets run on my 300BO and Rifle Dynamics SBR's. My next can purchases will be a Sandman K and a SF RC2.