Posted by Roger Wang on 4/30/2021 to
6315KM, 6310KM, other Keymo compatible muzzle devices and Surefire
suppressor mounts have smaller/thinner wrench flats than the A2. When
the flat is very close to the hand guard, or when the alignment shims
are of slightly larger OD than the barrel, an armorer's wrench often has
a hard to getting its 3/4 wrench into what little space there is to
gain purchase on the flats.
JMW (Joint Muzzle device Wrench) has a thin 3/4" side specifically designed to work with the thin flats of suppressor mounts.
Please do not use a screw driver to torque muzzle devices. Doing so will deform the ports, and cause damage to them.
DO:
Bring it to a competent gunsmith.
Use a JMW wrench, torque to 25 +/- 5 lbs.
DO NOT:
Use a screw driver
Use a pipe wrench
Use Ugga dugga, that is not a torque value, and it is not recognized by any authority or institution on measurement.
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