The SI JCOMP V2 is the classic Type 89 compensator re-engineered and updated for the 21st century. This compensator has an increased muzzle rise compensation, and is compatible with Oppressor and FerFrans concussion reduction devices. The J-COMP concept comes from the Type 89 Japanese assault rifle used by the Japan Self-Defense Forces, the Japan Coast Guard's Special Security Team units, and the Special Assault Team.