The Griffin Armament M4SD series of silencers are known for theirperfect combination of lightweight and durability whilst still providing peakperformances. Their products are a result of a ten year study of soundsuppressor design and a rigorous seven year R&D; program put together fromcomputer design, field testing and actual combat operations in Afghanistanduring Operation Enduring Freedom.The second generation version of the PTS Griffin Armament M4SD-K MockSuppressor encompasses the latest Griffin Armament suppressor design. The special machined fluted surface designreduces weight while increasing body strength. On the real suppressor, the increased surface area aids heat dissipationfor greater longevity and durability during sustained use. The 5.75 inch long M4SD-K's ultra-compactsize aids in maneuverability and minimally affects the weight balance of thegun. It also features Griffin Armament’s trademark SDQD mounting interface,well-known as one of the fastest and most secure mounting interfaces on the suppressormarket.