The CGS SCI-Six is optimized specifically for the 5.56x45mm cartridge the CGS SCI-Six prioritizes backpressure sound and flash reduction. With gas flash and sound cut down alongside weight and length the CGS SCI-Six is a top choice for the discerning 5.56 user. Thi suppressor limits the gas coming back into the action keeping rifles running clean and smooth while also dampening recoil and decibels. And if low light is a concern the SCI-Six has you covered with its flash hiding end cap. Noise reduction and recoil management are excellent making this suppressor an easy pick for shooters who want to optimize their 5.56 rifle build.