dcsimg
This website is not affiliated with the U.S. government or military.

071-311-2025 (SL1) - Maintain an M16-Series Rifle

Standards: Cleaned, inspected, and lubricated the rifle and magazine so they functioned correctly. Cleaned and inspected the ammunition. Turned in any unserviceable ammunition.

Conditions: Given an M16-series rifle, magazine, 5.56-mm ammunition, small-arms maintenance equipment case, and lubricating instructions. You have the following cleaning materials: swabs, pipe cleaner, cleaner lubricant preservative (CLP). You also have lubricating oil, semifluid, weapons; lubricating oil, arctic weapons; and rifle bore cleaner.

Standards: Cleaned, inspected, and lubricated the rifle and magazine so they functioned correctly. Cleaned and inspected the ammunition. Turned in any unserviceable ammunition.

Performance Steps

1.   Clear the rifle.

a. Remove the magazine from the rifle if there is one present.

b. Cock the rifle.

c. Turn the selector to SAFE (figure 071-311-2025-1).



Figure 071-311-2025-1. Selector lever on safe

 

Note. The selector cannot be turned to SAFE unless the rifle is cocked.

d. Lock the bolt open (figure 071-311-2025-2).



Figure 071-311-2025-2. Locking the bolt open

 

(1)  Pull the charging handle rearward.

(2)  Press the bottom of the bolt catch.

(3)  Allow the bolt to move forward until it engages the bolt catch.

(4)  Return the charging handle to the forward position.

(5)  Ensure the selector is on SAFE.

e. Inspect the receiver and chamber to ensure they do not contain ammunition (figure 071-311-2025-3).



Figure 071-311-2025-3. Inspecting the chamber

 

f.  Allow the bolt to go forward by pressing the upper portion of the bolt catch (figure 071-311-2025-4).



Figure 071-311-2025-4. Releasing the bolt

 

2.   Disassemble the rifle.

a. Verify the rifle is clear.

b. Remove the sling.

c. Remove the handguards if you can see dirt or corrosion through the vent holes (figure 071-311-2025-5). Handguards on the M16A2 are interchangeable because they are identical.



Figure 071-311-2025-5. Removing the handguards

 

WARNING: Use care to avoid bending or denting the gas tube while removing the handguards.

d. Push the takedown pin as far as it will go and pivot the upper receiver from the lower receiver (figure 071-311-2025-6).



Figure 071-311-2025-6. Pushing the takedown pin

 

e. Push the receiver pivot pin (figure 071-311-2025-7).


Figure 071-311-2025-7. Pushing the receiver pivot pin

f.  Separate the upper and lower receivers (figure 071-311-2025-8).


Figure 071-311-2025-8. Separating the upper and lower receivers

 

g. Pull back the charging handle (figure 071-311-2025-9).


Figure 071-311-2025-9. Pulling the charging handle

 

h. Remove the bolt carrier and bolt (figure 071-311-2025-10).


Figure 071-311-2025-10. Removing the bolt carrier and bolt

 

i.   Remove the charging handle (figure 071-311-2025-11).


Figure 071-311-2025-11. Removing the charging handle

 

j.   Remove the firing pin retaining pin (figure 071-311-2025-12).


Figure 071-311-2025-12. Removing the firing pin retaining pin

 

k. Put the bolt assembly in the locked position by pushing in the bolt (figure 071-311-2025-13).


Figure 071-311-2025-13. Bolt in the locked position

 

l.   Remove the firing pin by allowing it to drop out of the rear of the bolt carrier into your hand (figure 071-311-2025-14).


Figure 071-311-2025-14. Removing the firing pin

 

m.   Remove the bolt cam pin by turning it one-quarter turn and lifting it out (figure 071-311-2025-15).


Figure 071-311-2025-15. Removing the bolt cam pin

 

n. Pull the bolt assembly from the carrier (figure 071-311-2025-16).


Figure 071-311-2025-16. Removing the bolt assembly

 

Note. Perform steps o through r when the parts are dirty or damaged.

o. Remove the extractor pin by pushing it out with the firing pin (use care not to damage the firing pin) (figure 071-311-2025-17).


Figure 071-311-2025-17. Removing the extractor pin

 

p. Lift out the extractor and spring (figure 071-311-2025-18), taking care so the spring does not separate from the extractor.


Figure 071-311-2025-18. Removing the extractor and spring

 

Note. Press the top of the extractor to check spring function.

q. Release the buffer by pressing the buffer and depressing the retainer.

r.  Remove the buffer and action spring separating the buffer from the spring (figure 071-311-2025-19 and figure 071-311-2025-20).


Figure 071-311-2025-19. Separating the buffer and spring

 


Figure 071-311-2025-20. Separating the buffer and spring (continued)

s. Do not disassemble the rifle further.

3.   Clean the rifle by removing carbon buildup and lubricating according to lubrication instructions. Make sure you remove any excessive oil from the bore before firing.

Note. After firing ball or blank ammunition, clean the weapon one time only with CLP. Under all but the coldest arctic conditions, use only CLP to lubricate the rifle.

a. Clean the upper and lower receiver group using CLP to remove powder fouling in the upper receiver (figure 071-311-2025-21).


Figure 071-311-2025-21. Cleaning the receivers

 

b. Clean the bolt carrier group, wiping the following parts with swabs and other parts from the small-arms maintenance equipment case (figure 071-311-2025-22).


Figure 071-311-2025-22. Cleaning the bolt carrier group

 

(1)  The outer and inner surfaces of the bolt carrier.

(2)  The carrier key.

(3)  The firing pin recess and firing pin.

(4)  The firing pin hole with a pipe cleaner.

(5)  The carbon deposits and dirt from the locking lugs.

(6)  The areas behind the bolt ring and under the lip of the extractor.

c. Clean the following rifle parts, lightly lubricating with CLP (figure 071-311-2025‑22).

(1)  Lugs in the barrel extension, bore, and chamber.

(2)  Bolt carrier.

(3)  Slide cam pin area.

(4)  Piston rings.

(5)  Outside the bolt body.

(6)  Inside the bolt carrier key.

(7)  Firing pin and firing pin recess.

(8)  Outside surface of the protruding gas tube with a worn bore brush.

(9)  Buffer.

(10) Action spring.

(11) Inner surfaces of the lower receiver extension.

(12) Inside the lower receiver.

(13) All other components.

4.   Inspect disassembled rifle bolt assembly (figure 071-311-2025-23).


Figure 071-311-2025-23. Inspecting the bolt assembly

 

a. Identify defective or missing components.

b. Report deficiencies to the armorer.

WARNING: Do not interchange bolts between rifles.

5.   Assemble the rifle.

a. Insert the spring and buffer (figure 071-311-2025-24).


Figure 071-311-2025-24. Placing the spring and buffer

 

b. Insert the extractor and spring (figure 071-311-2025-25).


Figure 071-311-2025-25. Placing the extractor and spring

 

c. Push the extractor pin in (figure 071-311-2025-26).


Figure 071-311-2025-26. Holding the extractor pin in

 

d. Slide the bolt into the carrier until the bolt cam pin hole in both the bolt carrier and the bolt are aligned (figure 071-311-2025-27).


Figure 071-311-2025-27. Placing the bolt in the carrier

 

e. Place the bolt cam pin by putting it in the bolt carrier, turning it one-quarter turn (figure 071-311-2025-28).


Figure 071-311-2025-28. Replacing the bolt cam pin

 

f.  Drop in the firing pin to seat it (figure 071-311-2025-29).


Figure 071-311-2025-29. Placing the firing pin

 

g. Put the firing pin retaining pin in the bolt carrier to seat it (figure 071-311-2025‑30).


Figure 071-311-2025-30. Placing the firing pin retaining pin

 

h. Pull the bolt back (figure 071-311-2025-31).


Figure 071-311-2025-31. Pulling back on the bolt

 

i.   Place the charging handle by engaging it, then pushing the charging handle part of the way in (figure 071-311-2025-32).


Figure 071-311-2025-32. Placing the charging handle in the receiver

 

j.   Slide the bolt carrier into the upper receiver (figure 071-311-2025-33).


Figure 071-311-2025-33. Placing the bolt carrier

 

k. Push the charging handle and bolt carrier together in the upper receiver (figure 071-311-2025-34).


Figure 071-311-2025-34. Placing the charging handle and the bolt carrier

 

l.   Join the upper and lower receiver (figure 071-311-2025-35).


Figure 071-311-2025-35. Joining the upper and lower receivers

 

m.   Engage the receiver pivot pin (figure 071-311-2025-36).


Figure 071-311-2025-36. Engaging the receiver pivot pin

 

CAUTION: The selector lever must be on SAFE before closing the upper receiver

n. Close the upper and lower receiver groups, seating the takedown pin and ensuring the selector switch is on SAFE (figure 071-311-2025-37).


Figure 071-311-2025-37. Seating the takedown pin

 

o. Put the handguards in place (figure 071-311-2025-38).


Figure 071-311-2025-38. Placing the handguards

 

p. Replace the sling (figure 071-311-2025-39).


Figure 071-311-2025-39. Placing the sling

 

6.   Disassemble the magazine without removing the follower from the spring.

a. Release the base catch (figure 071-311-2025-40).


Figure 071-311-2025-40. Releasing the base catch of the magazine

 

b. Remove the base (figure 071-311-2025-41).


Figure 071-311-2025-41. Removing the base of the magazine

 

c. Remove the spring and follower by jiggling them (figure 071-311-2025-42).


Figure 071-311-2025-42. Removing the magazine spring and the follower

7.   Clean the magazine.

a. Wipe the dirt from the tube, spring, and follower.

b. Lubricate the spring lightly.

8.   Assemble the magazine.

a. Jiggle the spring and follower together to install them in the magazine.

b. Slide the base under all four tabs, making sure the print is on the outside.

9.   Clean the ammunition using a clean, dry cloth to wipe dirt and foreign matter from the ammunition. Do not coat with oil.

Evaluation Preparation: 

Setup: Have soldier use his own rifles and magazines. Provide swabs, CLP, pipe cleaners, and, if available, preservative lubricant (PL), special lubricating oil, and rifle bore cleaner (RBC). (The soldier should not select the PL, special lubricating oil, or RBC for use.) Also, provide several rounds of dummy ammunition, if available.

Brief Soldier: Tell the soldier to clean, inspect, and lubricate the rifle and magazine following normal safety practices.

Performance Measures

GO

NO GO

1.   Cleared the rifle before disassembly.

--

--

a. Removed the magazine from the rifle.

 

 

b. Cocked the rifle.

 

 

c. Turned the selector to SAFE.

 

 

d. Locked the bolt open.

 

 

e. Checked the receiver and chamber to ensure they did not contain ammunition.

 

 

f.  Allowed the bolt to go forward by pressing the upper portion of the bolt catch.

 

 

2.   Disassembled the rifle.

--

--

a. Verified the rifle was clear.

 

 

b. Removed the sling.

 

 

c. Removed the handguards if dirt or corrosion could be seen through the vent holes.

 

 

d. Pushed the takedown pin as far as it would go and pivoted the upper receiver from the lower receiver.

 

 

e. Pushed the receiver pivot pin.

 

 

f.  Separated the upper and lower receivers.

 

 

g. Pulled back the charging handle.

 

 

h. Removed the bolt carrier and bolt.

 

 

i.   Removed the charging handle.

 

 

j.   Removed the firing pin retaining pin.

 

 

k. Put the bolt assembly in the locked position by pushing in the bolt.

 

 

l.   Removed the firing pin by allowing it to drop out of the rear of the bolt carrier into hand.

 

 

m.   Removed the bolt cam pin by turning it one-quarter turn and lifting it out.

 

 

n. Pulled the bolt assembly from the carrier.

 

 

o. Removed the extractor pin by pushing it out with the firing pin.

 

 

p. Lifted out the extractor and spring, taking care so the spring did not separate from the extractor.

 

 

q. Released the buffer by pressing the buffer and depressing the retainer.

 

 

r.  Removed the buffer and action spring separating the buffer from the spring.

 

 

3.   Cleaned the rifle using the correct materials.

--

--

a. Cleaned the upper and lower receiver group.

 

 

b. Cleaned the bolt carrier group.

 

 

c. Cleaned all other rifle parts lubricating the rifle with CLP.

 

 

4.   Inspected for unserviceable parts.

--

--

a. Identified the defective or missing components.

 

 

b. Reported deficiencies to the armorer.

 

 

5.   Assembled the rifle.

--

--

a. Inserted the spring and buffer.

 

 

b. Inserted the extractor and spring.

 

 

c. Pushed the extractor pin in.

 

 

d. Slid the bolt into the carrier until the bolt cam pin hole in both the bolt carrier and the bolt were aligned.

 

 

e. Placed the bolt cam pin by putting it in the bolt carrier, turning it one-quarter turn.

 

 

f.  Dropped in the firing pin to seat it.

 

 

g. Put the firing pin retaining pin in the bolt carrier.

 

 

h. Pulled the bolt back.

 

 

i.   Placed the charging handle by engaging it, then pushed the charging handle part of the way in.

 

 

j.   Slid the bolt carrier into the upper receiver.

 

 

k. Pushed the charging handle and bolt carrier together in the upper receiver.

 

 

l.   Joined the upper and lower receiver.

 

 

m.   Engaged the receiver pivot pin.

 

 

n. Closed the upper and lower receiver groups.

 

 

o. Put the handguards in place.

 

 

p. Replaced the sling.

 

 

6.   Disassembled the magazine without removing the follower from the spring.

--

--

a. Released the base catch.

 

 

b. Removed the base.

 

 

c. Removed the spring and follower.

 

 

7.   Cleaned the magazine.

--

--

a. Wiped the dirt from the tube, spring, and follower.

 

 

b. Lubricated the spring lightly.

 

 

8.   Assembled the magazine.

--

--

a. Jiggled the spring and follower together to install them in the magazine.

 

 

b. Slid the base under all four tabs, making sure the printed portion was on the outside.

 

 

9.   Cleaned the ammunition.

--

--

Evaluation Guidance:  Score the soldier GO if all performance measures are passed. Score the soldier NO GO if any performance measure is failed. If the soldier scores NO GO, show him what was done wrong and how to do it correctly.

References

 

Required

Related

 

FM 23-9

 

 

TM 9-1005-249-10