Manual

25
4.1 Detailed Operator’s Maintenance
Perform detailed maintenance every 2,000 rounds or once weekly while operating in normal
field conditions. Ensure weapon is clear prior to performing any maintenance.
1. Detail disassemble weapon as described in Section 3.1.
2. Perform Routine maintenance as detailed in the previous section.
3. Scrub extractor with GP brush dipped in cleaning solvent or CLP. Pay particular
attention to remove any built up brass deposits in the extractor groove. oroughly
wipe away any remaining cleaning solvent or CLP with a rag.
4. Scrub bolt carrier, bolt body, firing pin and interior of the upper receiver with GP
brush dipped in cleaning solvent or CLP. Punch firing pin hole and firing pin
cavity with a pipe cleaner. oroughly wipe away any remaining cleaning solvent
or CLP with a rag. Apply a moderate coat of lubricant to the inside of the bolt
carrier where the bolt installs. Apply point lubrication to the extractor where
the pin installs and the bolt cam pin when it is installed. Apply a light coat of
lubricant to the interior of the upper receiver prior to re installing the charging
handle and bolt carrier assembly.
5. Scrub gas piston nozzle with a dry brass wire brush. oroughly wipe away any
remaining carbon residue with a rag (rag may be dampened in cleaning solvent).
(NOTE: e gas piston nozzle should be completely dry before reassembling the
weapon. Do not apply lubricants as this will cause fouling when fired).
6. Scrub the gas piston cup inside and out with a dry brass wire brush. If surface rust
is present on the outside of the piston cup remove with a small amount of
lubricant and a wire brush. Apply a light coat of lubricant to the outside of the
piston cup and wipe off any excess lubricant or residue with a rag.
(NOTE: As a general practice, do not introduce any lubricant into the inside of
the piston cup as this may cause fouling when fired).
If the weapon is to be stored for a longer period of time, place a light coating
of CLP on the nozzle and reassemble. e user can wipe off the excess prior to
firing. It is inconsequential to function if the user does not wipe off excess CLP
prior to firing, but it may cause some smoke as the lubricant burns off with an
aggressive firing schedule.
7. Scrub the intermediate rod, operating rod, operating rod spring and operating
rod spring cup with GP brush dipped in cleaning solvent or CLP (these will be
very clean to start with as they are not directly exposed to carbon). oroughly
wipe away any remaining cleaning solvent or CLP with a rag. Apply a light coat
of lubricant to the intermediate rod, operating rod, operating rod spring and
operating rod spring cup.
8. Reassemble weapon and perform functions check as detailed in Section 2.1.