Excellent used condition V SEVEN muzzle brake in 5/8x24 for 7.62/.30 caliber — I used this on a .300 blackout for one range visit then switched to a suppressor flash hider. There is no carbon build up (very low round count), minor wear from install/uninstall. From their website: “MAJOR RECOIL REDUCTION & MUZZLE DOWN AFFECT FOR ULTRA FLAT RAPID FIRE.” Comes from smoke-free home. I’m not interested in any trades. Local Idaho Falls meet up.