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Cleaning, Lubrication, and Maintenance


Routine maintenance is essential to keeping your Model R-15 and Model R-25 firearm in top condition for years to come.

Inspection - Cleaning - Lubrication

AFTER FIRING YOUR RIFLE, clean it as soon as possible to make the job easier and to avoid allowing the development of any corrosion.

When your firearm has not been fired, you should clean it once or twice a year if you live in a temperate climate, or as often as once a week in a tropical climate.

If you get your firearm wet, clean it as soon as possible to avoid the onset of corrosion or rust. Use a high quality Remington rifle cleaning kit that includes a cleaning rod; swab holder; cotton flannel bore patches; a small nylon brush; brass wire bristle bore and chamber brushes and a high quality action cleaner such as Rem Action Cleaner, a high quality gun oil such as Rem Oil and Remington Brite Bore or 40-X Bore Cleaner.

After you have disassembled the rifle, thoroughly clean, inspect and lubricate all parts according to the techniques described below.


Detailed Cleaning Techniques

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CLEANING THE BORE: The bore of your Remington R-15 or R-25 rifle has Lands and Grooves called rifling. Rifling makes the bullet spin very fast as it moves down the Bore and down range. It is difficult to push a new, stiff Bore Brush through the Bore. You will find it much easier, and more effective, to pull your Bore Brush through the Bore. Also, because the brush will clean better if the bristles follow the grooves (this is called tracking), you want the Bore Brush to be allowed to turn as you pull it through. A high quality cleaning rod with a ball bearing handle which allows the brush to turn as it passes through the bore will assist in cleaning your rifle.



  1. Assemble your cleaning rod if required. Attach the Patch Holder to cleaning rod.
  2. Point Muzzle down, Hold the Upper Receiver in one hand while inserting the end of the Rod with Patch Holder attached into the Chamber. Guide the Rod carefully through the Bore. CAUTION: Do not let the Rod or its threaded end scratch the Bore or Firing Chamber. About 2-3 inches of the Rod should protrude out of the Muzzle.
  3. Attach the Handle Section of the Cleaning Rod to the end of the Rod sticking out of the Muzzle (if required), and swab out the Bore with a patch moistened with a high quality bore cleaner such as Remington Brite Bore or 40-X Bore Cleaner.
  4. Remove Patch Holder and attach Bore brush.
  5. Pull the Brush through the Bore and out the Muzzle. You should be able to see the Rod twisting as you pull it - this is the Brush "tracking" in the rifling.
    NEVER reverse the direction of the Bore Brush while it is in the Bore.
  6. After one pull, take off the handle section and repeat the process. After three or four pulls, the three rod sections and the Bore Brush may become screwed tightly together. Loosen them up and repeat the process.
  7. Run a patch through the Bore occasionally to help clean out the debris that the brush has loosened. Just replace the Bore Brush with the Rod Tip (Patch Holder) and a wet patch. Pull it through. Always have the Bore wet with cleaner before trying to pull a brush through.

Cleaning the Upper Receiver

NOTE: Check to ensure that there is no looseness between the Barrel and the Upper Receiver - if you detect any movement by twisting with your hands, the Barrel Nut must be retorqued. Take the Rifle to a qualified gunsmith or Remington Authorized Repair Center for such maintenance.

  1. Using a high quality cleaner such as Rem Action Cleaner, clean all areas (inside and out) of Powder Fouling, Corrosion and Dirt. NEVER use a wire brush or any type of abrasive to clean the Aluminum Upper Receiver - you may scratch and damage the finish. A toothbrush or stiff bristle nylon brush is good for loosening any dirt buildup, and won't scratch the Receiver.
  2. Clean the Firing chamber. Dip a Chamber Brush in bore cleaner and use at least 5 plunge strokes and 3 - 360° clockwise rotations. Then swab out the Bore as described previously to remove contaminated solution or loosened debris. (picture 29)
  3. Use the Bore Brush - wet with bore cleaner - to clean carbon and powder residue from around the Gas Tube. Run a Pipe Cleaner in to the Gas Tube, clean the Bolt Locking Lugs, Bolt Rings, Firing Pin, Bolt Cam Pin, lip of the Extractor, and inside the Bolt Carrier from both front and rear.
  4. Wipe all components clean and dry, and inspect for excessive wear, corrosion or mechanical damage. If you notice any excessive wear or damaged components, DO NOT FIRE THE RIFLE. Have the rifle inspected by a Remington Authorized Repair Center.

Cleaning the Bolt, Bolt Carrier & Components

  1. Clean out the Gas Key on top of the Bolt Carrier with a cotton swab or a Pipe Cleaner. Also clean out any carbon/powder residue from vent holes in the Bolt Carrier. (picture 30)
  2. Clean and inspect Bolt, Cam Pin, Firing Pin and Firing Pin Retaining Pin thoroughly.
    CHECK THE BOLT: Look for cracks or fractures, especially in the Cam Pin hole area. (picture 31)
    Inspect bolt Face - Bolts with any pitting extending into the firing pin hole should be replaced. (picture 32)
    If it is cracked, or chipped, it should be replaced. NOTE: Cam Pin can only be installed in Bolt from one side - so Ejector will be positioned correctly. (picture 31A)
    If it is bent, cracked, too blunted or too sharp, it should be replaced. (picture 31B)
    If it is bent, or badly worn, it should be replaced. Never use a "Cotter Pin" as a substitute for a real Firing Pin Retaining Pin. Cotter pins are not made of heat treated spring steel and their round head shape will cause damage. (picture 31C) (Pictures 30, 31, 31A, 31B, 31C are below)
  3. CHECK THE EXTRACTOR AND EXTRACTOR SPRING: If the Extractor is chipped, or has broken edges in the area of the lipthat engages the cartridge rim, it should be replaced.  Check that the rubber insert is inside the Extractor Spring. Clean off and any Carbon buildup or powder residue. (picture 33)

Cleaning/Lubricating the Ejector

NOTE: The design of the Ejector makes its disassembly for cleaning somewhat impractical (i.e. we don't recommend it). Make sure your rifle ejects empty cases efficiently by following these steps on a monthly basis (more frequently if firing blanks).

  1. With the Bolt removed from the Bolt Carrier and the Extractor installed, hold it as shown, and dribble a few drops of Rem Oil around the Ejector to form a puddle. (picture 34)
  2. Take a fired or dummy case and place it under the lip of the Extractor. With a rocking motion, press the case down against the Ejector. Since the Ejector is spring loaded, some resistance will be felt. Press on the case until it stops against the bolt face. Ease off with your thumb slightly and press down again. Repeat several times. Replace the Rem Oil frequently. Once the spring action of the Ejector is smooth and strong, dry off any excess lubricant. (picture 35)

Cleaning The Lower Receiver

  1. Clean all areas of Powder Fouling, Corrosion, Dirt and Rust. Again, never use a wire brush or any type of abrasive to clean the Aluminum Lower Receiver.
  2. Wipe any dirt from the Trigger Mechanism. Carefully clean the Magazine Release Button and the cavity for the Magazine Catch on the left side of the Receiver. Also inspect and clean the Bolt Catch Mechanism and Receiver's Takedown and Pivot Pins. Clean the Buffer, Action Spring, and inside the Lower Receiver Extension (the Buffer Tube). A rag attached to the Cleaning Rod and Patch Holder can be used to wipe inside the Buffer Tube. (picture 28)
  3. If rifle has been used in very dirty/muddy conditions, the Vent Screw in the fixed Buttstock (shown) or the Vent Hole in the Telestock Receiver Extension may need to be cleaned out.  Use a Pipe Cleaner or piece of wire to ensure that Vent Hole is clear. (Picture 36)
  4. Telescoping Buttstocks may require cleaning as necessary. Telescoping Stock Latch can be pulled down to remove Stock. Clean the 6-Position Lock Holes, and lightly lube the Receiver Extension and Latch Mechanism to ensure proper telescoping action. Solid Buttstocks may require cleaning/lubrication of Storage Compartment Door Latch (if present) and Hinge, and interior of Storage Compartment.

Lubrication - Upper & Lower Receivers

Upper Receiver

Lightly Lubricate the inside of Upper Receiver, the Bore and Chamber (using the cleaning rod and a patch), the outer surfaces of the Barrel, and surfaces under the Handguards. Be sure you lubricate in and around all the Locking Lugs. The Forward Assist should also be lightly lubed inside the Receiver and checked for function.

Lower Receiver

Lower Receiver Extension: Lightly lubricate inside the Lower Receiver Extension (Buffer Tube), the Buffer and the Action Spring. Also lightly lubricate the Telescoping Stock Latch (collapsible stock models only) and exterior of the Receiver Extension. Lower Receiver: Generously lubricate ALL MOVING PARTS INSIDE THE LOWER RECEIVER with Rem Oil including the Trigger, Hammer, Safety, Bolt Catch, Magazine Release, etc.), and their various Pins and Detents. Don't forget the Takedown and Pivot Pins and their Detents. Use an oiled rag to wipe off any fingerprints on the exterior surfaces (they can start the corrosion process). A black cloth is best as it won't leave visible lint.

Lubrication - Bolt Carrier Group

Firing Pin: Lightly lubricate the Firing Pin with Rem Oil - also the Firing Pin recess in the Bolt. (picture 31-31B)

Bolt: Generously lubricate the Bolt, its Cam Pin area, the Bolt Gas Rings. A lighter application is good on the Extractor and its Pin. (picture 31 A and C)

Charging Handle: Lightly lubricate the Charging Handle and its Latch and Spring.

Bolt Carrier: Lightly lubricate the inner and outer surfaces of the Bolt Carrier. Generously lubricate the Cam Pin area and the "Slide" Rail areas of the Bolt Carrier where they contact the inside of the Receiver. (picture 38)

Carrier Key: The inside of the Carrier Key on the Bolt Carrier should be dried with a cotton swab or Pipe Cleaner - then place one drop of Rem Oil inside. (picture 39)



To reassemble the rifle, follow these steps:

  1. Insert Action Spring and Buffer (the Spring will lock onto the Buffer if you slide it on - then push and twist counterclockwise). Depress Buffer Detent and push buffer in past the Detent, then release. (picture 27)
  2. Insert Extractor and Spring. NOTE: Extractor Assembly has a Rubber Insert within the Spring. Be sure not to lose it. If the Spring comes loose, put the large end of the Spring in the extractor and seat it (a metal punch works well). (picture 40)
  3. Then push down on Extractor to depress Spring, and reinsert Extractor Pin. (picture 41)
  4. At the back end of the Bolt, stagger the Gas Ring Gaps to reduce gas pressure loss. Position the three ring gaps 120° apart around the bolt (3rd gap not seen at back side of bolt).  The rings will slide around in their groove by pushing them into position with a small sharp object. (picture 42)
  5. Insert Bolt into Bolt Carrier. Twist into position so Cam Pin can be inserted (remember Cam Pin can only be installed in Bolt from one side, so if it doesn't fit right away, twist the Bolt 180° and try again). (picture 43)
  6. Once Cam Pin is inserted, twist it 90° (this will allow insertion of the Firing Pin).
  7.  Drop in and seat firing Pin. (picture 44) Pull bolt out (picture 45), then reinsert Firing Pin Retaining Pin. (picture 46) NOTE: After inserting Firing Pin Retaining Pin, Firing Pin should not fall out when Bolt Carrier Group is turned upside down.
  8. Insert Charging Handle into Upper Receiver and lower the "ears" at front end of Handle into cutouts in Receiver.  Then slide charging Handle partially into Receiver. (picture 19)
  9. Lower complete Bolt Carrier Assembly into Upper Receiver. (picture 18) Gas Key will fit into groove in the Charging Handle. REMEMBER, Bolt must be pulled to "out" position in the Carrier so Cam Pin will fit into the channel in the Upper Receiver.
  10. Then slide the Bolt Carrier Assembly and Changing Handle all the way into the Upper Receiver until Charging Handle Latch locks on the Receiver. (picture 17)

    NOTE: If Ejection Port Cover is closed, you will feel some resistance as you push Carrier and Handle in until you pop the Cover open.  If cover is already open, Handle and Carrier should slide in easily.
  11. To join Upper and Lower Receivers, position Pivot Pin Lug of Upper Receiver into slot at front of Lower Receiver and push Pivot Pin into place. (picture 47)
    ALWAYS place the Safety Selector Lever on SAFE before pivoting the Upper Receiver to a closed position on the Lower Receiver.
  12. After Receivers are closed, push in Takedown Pin.

NOTE: Pivot Pin and Takedown Pin are "captivated" in the Lower Receiver - meaning that they are held in by their Detents and Springs so they cannot fall out and get lost.

Magazine Disassembly/Reassembly

Most Mil. Spec. design M-16 / AR-15 type Magazines can be disassembled for cleaning. The Magazine Spring, Magazine Follower and Magazine Baseplate can be replaced if broken or excessively worn.

  1. To disassemble Magazine, pry up on bottom of Baseplate using a punch, and push indentations in Baseplate past Magazine Body. (picture 48)
  2. Slide Baseplate out of Magazine Body. (picture 49)
  3. Remove Magazine Spring and Follower out of magazine box body. (picture 50)
    TO CLEAN AND LUBRICATE:  Wipe all dirt from the Magazine Body, Spring, Baseplate and Follower. Then lightly lubricate the Spring.
    REASSEMBLY is the REVERSE of these steps. Make sure to slide the base under all four tabs until it snaps back under the catch.
    NOTE: Do not remove Follower from Spring.

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