Safety & Maintenance Instructions

FREEDOM. PASSION. PRECISION.
™
1. Remove the magazine, place the weapon on safe, and make sure that the chamber
is empty.
2. Remove the upper receiver from the lower receiver by pushing out the takedown and
pivot pins.
3. Remove the bolt carrier group and charging handle from the upper receiver.
4. Remove the bafe from the sound suppressor/barrel assembly by using the provided
removal tool by following the instructions in the manual. The bafe may have become
stuck due to excessive carbon fouling, and, it is recommended that the following bafe
removal procedure be followed:
a. Immerse the muzzle half of suppressor in Kano Kroil overnight. This can be done by
using a small container and by positioning the upper receiver group vertically so that
only the muzzle end is submerged. This will reduce the amount of solvent needed to
loosen the fouling around the bafe.
b. Position the upper receiver in a bench vise utilizing an upper receiver bench block
that supports the barrel extension lugs.
c. Using a torque limiting (preferred) or standard 1/2" square drive wrench and the
provided tool, remove the bafe from the suppressor tube. The threads are left hand
so turn clockwise to loosen.
d. Once the bafe is removed, the barrel can be cleaned with a cleaning rod, brush, jag,
and patches as normal. The inside of the suppressor tube and the bafe core can
also be cleaned using standard bore solvents and brushes. Carbon fouling on the
internals of a sound suppressor is normal and does not affect function.
e. Re-install the bafe per the instructions provided in the manual, remembering that
the threads are left-handed. Torque the bafe to 20-25 lb-ft. Excessive torque of
the bafe can damage the suppressor, barrel, or both, increasing the likelihood
of a bafe strike. It is recommended that this procedure be avoided unless absolutely
necessary, and be performed by a qualied gunsmith.
WARNING: DO NOT OVER TIGHTEN PAST 25 LB-FT. THIS MAY DAMAGE THE
SUPPRESSOR ASSEMBLY AND RESULT IN THE PROJECTILE STRIKING THE
BAFFLE UPON FIRING.
BAFFLE CLEANING PROCEDURE
1. With the bafe removed as outlined in the previous section, soak the bafe in a quality
solvent such as Kano Kroil, Hoppe’s No. 9, or similar product until carbon begins to loosen.
(Wear at the rear of the bafe (closest to the barrel muzzle) is normal and will not affect
function. The DDM4ISR bafe is designed to withstand many thousand rounds without
changes in sound reduction.)
2. With a nylon brush, gently scrub the loosened carbon from the bafe. Pay special
attention to the threaded portion of the bafe.
3. Lightly oil the threads and re-install per instructions in previous section.
5.7
STORAGE
WARNING: ALWAYS UNLOAD YOUR FIREARM FOR STORAGE, AND DO NOT
MIX AMMUNITION CALIBERS.