Ultradyne Vostok AK-47 Compensator 7.62x39mm 14x1 LH Salt Bath Nitride. The 2-port design is compact and lightweight but offers impressive performance that will help shooters stay on target. Gases are strategically diverted away and out of the shooters line of sight. Vostok strongly reduces recoil and minimizes muzzle rise helping the shooter get back on target quicker to ensure a more accurate followup shots. A crush washer is included for precision installation. Specifications for Ultradyne Vostok AK-47 Compensator: Manufacturer: Ultradyne Projectile Caliber: .312 Caliber Threads per Inch: 14x1 LH Color: Black Gun Model: AK-47 Caliber: 7.62x39mm Finish: Salt Bath Nitride Last Chance: Yes Outer Diameter: 0.8 in Weight: 56 g Fabric/Material: 416 Stainless Steel Length: 2.25 in Features of Ultradyne Vostok AK-47 Compensator Extreme Recoil Reduction Minimizes Muzzle Rise Package Contents: Ultradyne Vostok AK-47 Compensator What firearm models does the manufacturer say Ultradyne Vostok AK-47 Compensator is compatible with? The manufacturer says that Ultradyne Vostok AK-47 Compensator is compatible with AK-47Ultradyne UD10870: Vostok AK-47 Compensator 7.62x39mm 14x1 LH Salt Bath Nitride