SIEGE BRAKE SB3-5.56
SIEGE BRAKE SB3-5.56
Tuning
- Ensure that eye protection is worn at all times and ear protection is worn while live firing.
- Use proper live fire safety precautions. Ensure there is no one to the sides or in front of the shooter.
Installation
- Always ensure gun is unloaded before installing. Work should only be done by a qualified gunsmith.
- If installing on a rifle barrel shorter than 16 inches, the muzzle device must be permanently attached in line with BATFE regulations.
- To install, use provided crush washer. The “pointed” side of the washer should face rearwards.
- The top flat of the brake (side with the holes) should be clocked to the same angle as the top flat of the upper receiver.
- Ensure that the brake is aligned with bore of the barrel using a precision bore guide rod. This is a precaution as we’ve seen some AR barrels with non-concentric threads, although most are within tolerance.
Cleaning
- Always wear eye protection. Clean in a well-ventilated area and wear gloves.
- The inside of the rear expansion chamber does not need to be cleaned or disassembled. The high pressure muzzle gasses work to self clean the chamber and do not allow for excessive carbon buildup.
- Carbon will build up inside the primary side ports and tuning ports. Simply use a brass or aluminum punch/rod to chip out any excessive buildup.
- Some carbon buildup should not adversely affect performance; however, buildup can become excessive after several thousand rounds.
- It is recommended to have other variables, like adjustable gas systems and consistent ammunition set before tuning.
- Tuning of the Siege brake is done by drilling holes into the expansion chamber near the rear of the brake. There are 3 dimpled spot drills for you to start your tuning holes.
- Before drilling out the dimples it is important to test fire the gun and observe how the recoil is moving the gun.
- We recommend holding the gun neutrally and not applying excessive tension to control muzzle rise. You can fire single shots and watch how your sight moves or fire two rapid shots on a fresh target and note where the second shot is in relation to the first.
- For a right-handed shooter the gun will usually move up and to the right. A left-handed shooter will usually move up and to the left.
- First ensure the gun is unloaded and then start by drilling small holes on the same sides as the recoil movement. This can be done at the range with an electric hand drill.
- A 1/16” drill is a good starting point.
- A right-handed shooter would usually drill a hole in the top dimple and the right-side dimple.
- Slowly enlarge the holes until the gun returns to the same spot after firing. (Having a drill index on hand is recommended.)
- Holes can be drilled to a maximum of 11/64"(. 171") diameter. This will be enough to counter the recoil of any setup.