The SI JCOMP 2.0 is the classic Type 89 compensator re-engineered and updated for the 21st century.  Due to end user feedback, the favorite features of the original are retained, but the J Comp now features increased muzzle rise compensation, and is available in 7.62x39mm and .308/7.62x51mm in addition to 5.56x45/.223. Now also 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. Package includes:1x JCOMP 2.01x Crush WasherFeatures:2 chamber design greatly increases recoil managementHybrid flash hider/compensatorPre-drilled for pinning and weldingFor .308