This linear compensator redirects sound and concussion away from the shooter and down range. This device is particularly useful for AK Pistol builds and rifles with short barrels. The comp features 6 vent ports to aid in redirecting blast along with knurled spiral lightening flutes. This brake is also notched to properly lock in place with the detent on the FSB. Overall Length: 2.25 in Outer Diameter: 1.13 in. Net Weight: 5.7 oz. Material: Steel USA made