7mm/308 - Good for any bullet caliber up to and including 0.308 ie 7mm 284 270 (Magnums OK) - 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! HELLFIRE Muzzle Brake - 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. - 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. - Made from heat treated 17-4PH Stainless Steel - Brakes will be available in Black Nitride finish or raw stainless (all universal adapters will be black) - Manufactured on state of the art CNC Machines right here in NW Ohio. 100% Made in USA. - 1″ OD Brake 1.1″ OD collar - Brake assembly will add 2.6″ from the thread shoulder (approx 2″ added to OAL of barrel) 170.00,Brand: Area 419 Color: Black Nitride Material: Stainless Steel Muzzle Accessory Type: Muzzle Brake Thread Type: 5/8-24 Part Number: 419HF-BN-30-5824 UPC: 810080180093 Weight: 0.37 lbs

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