The Rotex 556 K suppressor is our shortest, most compact suppressor in our Rotex line. The K is ideally suited for use on carbines with barrels 14.5-inches and longer, where the K will provide excellent flash and sound reduction while minimizing the overall length and weight added to these longer carbines, without effecting the platforms balance. The K is a hair of 4-inches in length with a DM HUB and just over 5-inches in length with the included Rotex-SF QD HUB. Each suppressor is threaded 1.375x24TPI making it fully HUB compatible, should you choose to mix and match your attachment interfaces.