MUZZLE BRAKE QD FOR MARKSMAN & MARKSMAN PRS

Muzzle brake for the MARKSMAN and marksman prs suppressors for exceptional mil-spec adaptability and performance.

The system allows the operator to choose between significant recoil reduction and reduced length with the brake alone, or, sound and flash reduction with the Marksman or Marksman PRS suppressor attached.

Design Features

• Stainless steel used in all components. The muzzle brake is black Nitrited. Nitrite surface treatment makes the exposed brake extremely hard and durable thereby resisting wear and tear. The material selection prioritises durability and precision over lightweight.
• The muzzle brake features three large redirection baffles to drastically reduce recoil. The unit is attached to the rifle thread using a precision thread adaptor and timing (clocking) locknut (contra nut). It does not need gunsmithing to ensure correct clocking. When fitted and clocked, the gas is directed sideways only, eliminating excessive dust from under the muzzle.
• The muzzle brake first/rear chamber directs gas sideways and not rearwards; this shields the firer and reduces shockwave. The front two chambers redirect gas rearwards for maximum recoil reduction.
• The suppressor fits over the muzzle brake, containing it when attached. It has three expansion suppressor stages followed by a brake endcap. 
• A proprietary thread is used to attach the suppressor to the muzzle brake in seconds with minimum screwing on. The system uses multiple referenced interface surfaces to ensure the suppressor attaches true, concentric and repeatably, every time.
  
• This unit is designed for any calibre up to large magnum calibres such as 338LM or 300NM. Send it.
  
• The brake includes a thread adaptor and lock nut which are designed for long term or permanent fixing to your rifle. The quick attach / detach function refers to the suppressor onto the muzzle brake.
• A-Tec have only one grade of precision: Match Grade. A-Tec suppressors are second to none for concentricity, straightness and fine dimensional tolerances. This is especially evident in our bore apertures which are tight to the projectile to maximise sound reductive effect. To get peak performance from an A-Tec suppressor, one's rifle muzzle must be correctly crowned, threaded and shouldered.

What comes in the box?

1. Muzzle brake
2. Thread adaptor
3. Lock nut / Contra nut
4. Steel spanner / wrench
   

MOUNTING THE A-TEC MARKSMAN BRAKE

Do a dry run of the below steps before adding thread lock. Especially regarding the timing of the brake.

1. Place the rifle in a vice.
2. Thoroughly clean and degrease all components and threads.
3. Screw the stainless steel thread adaptor all the way into the suppressor/muzzlebrake and one full turn out again. The thread adaptor has the small unthreaded section inserted first. When running through this the second time, after applying thread locker, wipe off any excess thread locker here.
4. Screw on and torque up the black contra nut against the rear shoulder of the suppressor/muzzlebrake with the supplied wrench. For barrels with larger diameter than 23mm at the shoulder: Ensure the rear face of the steel thread adaptor is slightly proud of the black contra nut, one thread is enough. This is so the barrel thread shoulder meets the adaptor surface and not the contra nut.
5. Now screw the suppressor/muzzlebrake with the thread adaptor and contra nut on to the rifle muzzle thread.
6. Grasp the suppressor/muzzlebrake and apply torque to the suppressor/muzzlebrake by hand so that the thread adaptor is tight on the muzzle thread shoulder. We are using the suppressor/muzzlebrake locked on by the contra nut to get the thread adaptor torqued up on the muzzle thread shoulder.
7. Grasp the suppressor/muzzlebrake and loosen only the contra nut with the wrench without loosening the thread adaptor on the muzzle thread.
8. Adjust the suppressor/muzzlebrake rotation so the brake gas ports are directed horizontal. Try screwing on further first. If you hit the stop before achieving level, unscrew until level.
9. Reapply torque to the contra nut while grasping the suppressor/muzzlebrake to lock it in the level position.
10. Now disassemble, apply thread locker to the internal thread of the suppressor/muzzlebrake to secure the adaptor into the suppressor/muzzlebrake when it cures. Do the above steps again to permanently attach. Use Loctite 638 or equivalent. 
11. Let the thread locker set before attempting detachment from the rifle.