The SI JCOMP Gen2 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 5.56×45/.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.
Product Spec:
– Length: 2.55″ 
– Weight: 3.6 OZ
– Diameter (OD): 0.87″
– Diameter (ID): 0.26″ 
– Thread Pitch: 1/2×28 
– Caliber: .223/5.56
Package includes:
– 1x JCOMP 2.0
– 1x Crush Washer
– 2 chamber design greatly increases recoil management
– Hybrid muzzle brake/compensator
– Pre-drilled for pinning and welding 
– 1/2″x28 thread pitch
– for .223/5.56mm
Weight: 0.0000 oz
MPN: SI-JCOMP2-223/5.56
Muzzle Device Type: Compensator
Threads: 1/2×28
Caliber: .22 (.223/5.56/.224, etc.)
Finish: Nitride / Melonite
SKU: 1808

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