Area 419 Hellfire Self Timing Muzzle Brake 6.5mm Black Nitride 1/2-28

6.5mm – Good for any bullet caliber up to and including 0.264 (6.5mm) ie 257 (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 barre