Safety & Maintenance Instructions

DDM4
®
/ DD5
®
MANUAL P 31
9. Lightly dampen a annel patch with gun oil and pass it once through the
barrel, leaving a thin lm of oil on the inside surface. Leave this lm of oil on
the surface if rearm is to be stored. If it is not being stored, or if it is being
removed from storage for use, pass the dry patch through the barrel and
chamber to remove as much oil as possible.
10. Check that annel or brush bristles have not become lodged in any part of
rearm, then lightly lubricate (See Section 5.4).
11. Remove any gun-cleaning solution, oil, and ngerprints from the outside
surfaces of the rearm. (Finger moisture, if left, could start a corrosion process.)
12. Reassemble the rearm:
a. Insert the buffer/action spring and buffer into the receiver extension/
buffer tube on the rear of the lower receiver. The buffer retaining pin
should prevent any forward movement of the buffer/action spring.
b. Install the buttstock onto the lower receiver. Pull the release lever down
and push the buttstock forward on the receiver extension/buffer tube.
c. Insert the bolt into the bolt carrier. Take care to ensure the chamfered
edge of the bolt body where the cam pin sits is facing downward. The
cam pin should be inserted from the opposite side of the chamfered
edge. Another way to ensure proper bolt installation is to verify that the
extractor is oriented to the right side of the bolt carrier.
d. Insert the cam pin into the bolt and bolt carrier.
e. Rotate the cam pin 90 degrees to allow the ring pin to fully seat into the
bolt (not necessary on DD5).
f. Insert the ring pin (and the ring pin return spring – for DD5 only).
g. Insert the ring pin retaining pin from the left to right of the bolt carrier.
h. Install the charging handle into the upper receiver by pushing it forward
approximately one inch (1.5" on DD5) into the keyway and then up into
the upper receiver. You will not insert the charging handle all of the way
until it latches.
i. With the bolt fully extended forward, install bolt carrier group into the
upper receiver. Orient the gas key so that it ts into the charging handle.
Slide entire bolt carrier group forward and latch the charging handle into
the upper receiver.
j. Attach the upper and lower receivers together by orienting the front
upper receiver pivot-pin lug into the corresponding recess in the lower
receiver. Push the pivot pin from right to left until fully seated.
k. Pivot the rear end of the receivers together and push the rear takedown
pin from right to left until fully seated.
5.4
LUBRICATING/PRESERVATION
Use only high-quality gun oil when lubricating your Daniel Defense rearm. There are
many good options when it comes to lubricating your rearm. Check with the lubricant’s
manufacturer to see if it is correct for your application.