The Strike Industries Oppressor Concussion Reduction Device reduces side concussion without affecting muzzle braking performance. Strike Industries designed these Gun Parts with computer-aided flow dynamics to provide linear braking that retains more braking efficiency. The Strike Industries Oppressor Advanced Muzzle Device mounts with a proprietary QD system that allows rapid installation. Use the Strike Industries Carbon Steel Oppressor alone or combine it with other compatible Strike Industries muzzle devices. COMPATIBILITY: (Only with SI muzzle and SI SREM compatible devices) SI: Checkmate Comp, Cloak Flash Hider, JCOMP, King Comp, Mini King Comp, Triple Crown, Venom Flash Hider and Sierra Comp. Ferfrans: CQB Modular Muzzle Brake System. Desert Tech: Ratchet compensator, Micro Dynamic Riffle (MDR) w/ Ratchet compensator. Specifications for Strike Industries SI Oppressor: Manufacturer: Strike Industries Length: 2.9 in Weight: 9.5 oz Finish: Nitride Outer Diameter: 1.55 in Condition: New Fabric/Material: 1144 Carbon steel Color: Black Features of Strike Industries SI Oppressor Quick detach system Redirects sound and blast from compensators while maintaining the recoil reduction effects of SI muzzle devices One size fits both .223/5.56 and .308/7.62 SI muzzle devices Package Contents: Strike Industries SI Oppressor x1 OPPRESSOR