Area 419 2 Port Hellfire Self Timing Muzzle Brake 7mm/308 TPI Black Nitride 419HF-2P-30. or less. This brake will offer the greatest performance possible while maintaining shooter comfort. The HELLFIRE Self Timing Brake system is not just another knockoff copy of existing self timing brakes. It was engineered from the ground up to be extremely effective easier to install and much more versatile. Specifications for Area 419 2 Port HELLFIRE Self Timing Muzzle Brake w/Adapter: Manufacturer: Area 419 Color: Black Finish: Nitride Fabric/Material: Steel Gun Make: Universal Gun Model: Universal Outer Diameter: 1 in Length: 6 in Weight: 0.5 lb Condition: New Features of Area 419 2 Port HELLFIRE Self Timing Muzzle Brake w/Adapter Extremely easy installation brake WILL NOT turn as you torque the collar to lock. No more guessing where the brake ports will line up once you tighten it down Simple round knurled nut that requires no tools to time the brake. Return to zero is excellent. This means removal of your brake and re-installation will not require a zero change. Simply torque the universal adapter onto your barrel with a 5/8? wrench this piece never has to come off. Next LEFT HAND thread the brake/collar assembly onto the adapter until it is almost snug. Now rotate the brake until it is level push the brake into the adapter and you will feel it lock onto the taper. Now tighten the collar fully by hand and you are done Slightly rearward facing ports for the ideal balance of recoil reduction and shooter comfort. Proprietary port design controls muzzle rise without the use of top porting. Face of brake is engraved with caliber to indicate the top for correct orientation and a horizontal line to aid in leveling. Package Contents: Area 419 2 Port HELLFIRE Self Timing Muzzle Brake w/Adapter What firearm models does the manufacturer say Area 419 2 Port HELLFIRE Self Timing Muzzle Brake w/Adapter is compatible with? The manufacturer suggests that Area 419 2 Port HELLFIRE Self Timing Muzzle Brake w/Adapter is compatible with UniversalArea 419 419HF-2P-30: 2 Port Hellfire Self Timing Muzzle Brake 7mm/308 1/2-28 TPI Black Nitride