JMAC Customs RRD-4C 28S KeyMo Shoulder Mount - 1/2x28

These are designed to install with provided shim kit on standard shoulder mount style barrels (factory muzzle device installed with crush washer) and can be permanently attached using the provided pin. Threads: 1/2-28 threads Length: 2.82" long Material: 17-4ph Stainless Weight: 3.84oz Includes shim kit and pin (R)ecoil (R)eduction (D)evice (4) ports (C)ompensator (28) 1/2x28 threads (S)houlder (KM) KeyMo ***JMac Customs is NOT responsible for improper installation of this muzzle device or any damage to the suppressor using this device. We recommend this be professionally installed and checked to ensure alignment.*** This is a licensed product through Dead Air Silencers.