Unrivaled Armory, LLC
is not liable for injury,
damage or death from
the incorrect use of our products.
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
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
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
Tuning The Brake
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.
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.
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