Figure 3-28.--Disassembly of the 20-round magazine.
1. BARREL BORE and CHAMBER. After
these components, wipe them dry, and apply alight coat
of the recommended lubricant.
dipping a bore brush in the bore cleaner, brush from the
chamber to the muzzle, using straight-through strokes.
4. LOWER RECEIVER GROUP. With the bore
Do NOT reverse the brush while it is in the bore or it
brush or a swab coated with bore cleaner, remove dirt,
may jam. A jammed brush is hard to remove, and it can
carbon, and sand from the lower receiver group. Dry and
possibly damage the bore when you do this. After
apply alight coat of the recommended lubricant.
dipping the brush in bore cleaner, clean the chamber
with the chamber brush. Replace the bore brush with a
all cartridges from the magazine, depress the spring steel
slotted cleaning patch tip, and push the dry patches
lock band on the bottom of the magazine, using the nose
through the bore and chamber until they come out clean.
of a cartridge (fig. 3-28, view 1). Slide the base until it
After cleaning the bore, lightly lubricate the bore and
is free of the tabs, and remove it from the magazine body
chamber to prevent corrosion and pitting, using the
(fig. 3-28, view 2). Remove the magazine spring and
recommended lubricant on a patch. Lightly lubricate the
follower (fig. 3-28, view 3), but do not remove the
lugs in the barrel extension.
follower from the spring (fig. 3-28, views 4 and 5).
2. BOLT CARRIER GROUP. Dip the bore brush
Clean the exterior and interior of the magazine with a
in the bore cleaner, and clean the inside of the carrier
dry rag or swab. Apply a light coat of the recommended
key. Dry with a pipe cleaner. Clean the locking lugs, bolt,
lubricant to the magazine spring only; otherwise, keep
extractor ejector, and bolt rings with the bore brush.
the magazine dry. You assemble the magazine in reverse
Remove any accumulation of dirt, carbon, or oil from
order and test it to ensure that the follower is free to
the firing pin and the external and internal surfaces of
move without binding. If the magazine and the
the bolt and bolt carrier. Be sure to wipe all parts dry;
ammunition in it gets wet, be sure to wipe them dry as
then lubricate them with the recommended lubricant.
soon as possible. When left wet, both the magazine and
3. UPPER RECEIVER GROUP. With the bore
the ammunition can become corroded and are dangerous
brush or a swab coated with bore cleaner, remove the
to use. Remember not to use oil or grease on any
powder fouling collected on the group. Clean the
cartridge. If you do this, injurious abrasives can collect
protruding gas tube inside and outside. After cleaning
in the weapon or produce excessive and hazardous