The Area 419 Hellfire Self Timing Muzzle 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. The Hellfire Muzzle Brake has rearward facing ports for the ultimate in recoil reduction. Independently tested side by side with the best brakes on the market. The Hellfire showed 52% recoil reduction on a 6.5 Creedmoor test rifle. This is ~4% more than the one of the most popular brakes on the market.FeaturesProprietary port design controls muzzle rise without the use of top portingFace of brake is engraved with caliber to indicate the top for correct orientation, and a horizontal line to aid in levelingMade from heat treated 17-4PH Stainless Steel1a ^2 OD Brake, 1.1a ^2 OD collarBrake assembly will add 2.6a ^2 from the thread shoulder