Features: Compensator specifically designed for the 14x1LH Metric Threads found on most AK47 rifles Machined from 8620 steel with a black oxide finish Heat treated for a life of hard use A total of eighteen ports distributed around the upper 270 degrees of the device help stabilize and reduce exiting gas pressure There are no ports facing directly upwards Lower 90 degree arc also has no gas ports Can safely be used with projectiles up to .311 inches (7.62mm) in diameter Outer diameter is a NATO standard 22mm Made in USA, counting towards 922r complianceBenefits: Designed to provide recoil reduction and virtually eliminate muzzle rise Mfg: Manticore Arms