Remington 870 Instruction Manual: A Comprehensive Guide

This manual provides detailed guidance on the iconic Remington 870 shotgun. It covers operation, maintenance, troubleshooting, and safety, ensuring users can confidently and responsibly utilize this firearm.

The Remington 870 is a legendary pump-action shotgun, renowned for its reliability, versatility, and enduring popularity since its introduction in 1950. It has become a staple for hunters, sport shooters, law enforcement, and military personnel alike, earning a reputation as one of the most trusted firearms ever produced.

This instruction manual serves as a comprehensive guide to understanding, operating, maintaining, and safely utilizing your Remington 870. Whether you are a seasoned shooter or a first-time owner, this manual will provide you with the necessary knowledge to maximize your enjoyment and ensure safe handling practices.

The 870’s design emphasizes simplicity and durability, making it exceptionally easy to disassemble for cleaning and maintenance. Its smooth pump-action and robust construction contribute to its consistent performance in various conditions. This manual will detail each component, explain the mechanics of operation, and offer step-by-step instructions for disassembly, cleaning, reassembly, and troubleshooting.

Always prioritize safety. Before handling your Remington 870, carefully review the safety precautions outlined in this manual. Proper understanding and adherence to these guidelines are crucial for preventing accidents and ensuring responsible firearm ownership.

II. Safety Precautions

Handling a firearm requires utmost responsibility and adherence to strict safety protocols. Always treat every firearm as if it is loaded. Keep the muzzle pointed in a safe direction at all times – never towards yourself or others. Your finger should remain off the trigger until you are ready to fire.

Before loading or unloading, always ensure the action is clear. Visually and physically inspect the chamber to confirm it is empty. Be certain of your target and what lies beyond it. Never shoot at anything you haven’t positively identified.

Always wear appropriate eye and ear protection when shooting. Store ammunition separately from firearms, and keep both in a secure location inaccessible to unauthorized individuals, especially children.

Modifications to the Remington 870 can affect its safe operation. Never alter or modify your firearm in any way. If you are unsure about any aspect of its operation or safety, consult a qualified gunsmith.

Be aware of all local, state, and federal laws regarding firearm ownership and usage. Responsible gun ownership is paramount. Failure to follow these safety precautions can result in serious injury or death.

III. Ammunition Compatibility

The Remington 870 is remarkably versatile regarding ammunition, but understanding compatibility is crucial for safe and reliable operation. This shotgun is primarily designed to chamber and fire 2 ¾ inch and 3 ½ inch shotshells. Using ammunition outside these specifications can lead to malfunctions or damage the firearm.

It’s essential to verify the shell length markings on your ammunition. Never attempt to load shells exceeding the 3 ½ inch limit, as this can cause a dangerous situation. The 870 can handle a variety of shot types, including lead, steel, and non-toxic alternatives, depending on local regulations and hunting requirements.

Always use ammunition that meets SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) standards. Avoid using reloaded or hand-loaded ammunition unless you are thoroughly familiar with the reloading process and adhere to strict quality control measures.

Inspect each shell before loading for any signs of damage or corrosion. Damaged ammunition should never be used. Refer to the shotgun’s markings and the ammunition packaging to confirm compatibility before each use. Incorrect ammunition can compromise safety and firearm performance.

IV. Parts Identification

Familiarizing yourself with the Remington 870’s components is fundamental for proper operation, maintenance, and disassembly. Key parts include the receiver, which houses the action and serves as the central structure of the shotgun. The barrel, available in various lengths and configurations, dictates the shotgun’s range and pattern.

The forend, or pump, is used to cycle the action, loading and ejecting shells. The stock provides a secure grip and shoulder support. The trigger group controls the firing mechanism, while the safety selector ensures safe handling. The magazine tube, located beneath the barrel, holds additional shells.

Important components within the receiver include the bolt, which locks the cartridge into the chamber, and the slide, which moves the bolt during cycling. The hammer strikes the firing pin, initiating the shot. Identifying these parts allows for accurate troubleshooting and informed maintenance.

Refer to the exploded diagram included in this manual for a visual representation of each component and its location. Understanding the function of each part is crucial for safe and effective use of the Remington 870.

V. Receiver and Action Assembly

Proper receiver and action assembly is critical for the safe and reliable function of the Remington 870. Begin by ensuring the receiver is clean and free of debris. Carefully insert the bolt into the receiver, aligning the bolt locking lugs with the corresponding recesses in the barrel extension.

Next, position the slide onto the receiver rails, ensuring smooth movement along its track. The slide should engage with the bolt, allowing for proper cycling of the action. Verify the trigger group is correctly seated within the receiver, ensuring the trigger pull is smooth and consistent.

Pay close attention to the alignment of the hammer and firing pin during trigger group installation. Secure all components with the appropriate pins and screws, tightening them to the manufacturer’s specified torque. A properly assembled action will exhibit smooth, consistent operation without binding or resistance.

Double-check all connections before proceeding. Incorrect assembly can lead to malfunctions and potentially dangerous situations. Refer to the exploded diagram for visual guidance and consult a qualified gunsmith if unsure about any step.

VI. Barrel and Forend Attachment

Secure barrel and forend attachment are paramount for accuracy and safe operation of the Remington 870. Begin by carefully threading the barrel into the receiver, ensuring it’s fully seated and aligned. Use a barrel wrench to tighten the barrel to the manufacturer’s specified torque – avoid over-tightening, which can damage the receiver.

Next, slide the magazine tube onto the barrel, aligning the detent and spring. Ensure the magazine tube is securely fastened and doesn’t exhibit any wobble. The forend then slides onto the magazine tube, covering the action.

Different forend types (wood, synthetic) may have slightly different attachment methods. Some utilize a retaining ring, while others simply slide and lock into place. Verify the forend is securely attached and doesn’t interfere with the pump action.

Regularly inspect the barrel and forend attachment for looseness. A loose barrel can affect accuracy and potentially create a dangerous situation. Always consult the exploded diagram for correct component placement and tightening procedures.

VII. Operation: Loading and Unloading

Safe and proper operation of the Remington 870 hinges on understanding loading and unloading procedures. Always ensure the firearm is pointed in a safe direction before handling ammunition. Begin by racking the slide fully to the rear, confirming the chamber is empty. Visually inspect the chamber to verify it’s clear.

To load, insert shells, one at a time, into the magazine tube, pushing them past the shell latch. Then, firmly pump the action to chamber a round. The safety should remain engaged until ready to fire.

Unloading involves two key steps. First, point the shotgun in a safe direction and pump the action several times to eject any shells in the chamber and magazine. Second, carefully remove any remaining shells from the magazine tube, using your fingers or a suitable tool.

Always double-check the chamber and magazine tube to ensure they are completely empty before storing or transporting the firearm. Familiarize yourself with these procedures for safe and responsible use.

VIII. Loading Shells into the Magazine Tube

Loading shells into the Remington 870’s magazine tube is a straightforward process, but requires attention to detail for smooth operation. Begin by ensuring the action is fully retracted and locked open. This provides clear access to the magazine tube opening, located beneath the barrel.

Insert shells, one at a time, base-first into the magazine tube opening. Apply gentle but firm pressure to push each shell past the shell latch, which is located near the receiver. You should feel a distinct ‘click’ as the latch engages each shell, securing it within the tube.

Avoid forcing shells into the tube, as this could damage the latch or the shells themselves. The 870 typically holds four to eight shells, depending on barrel length and shell size. Once loaded, gently cycle the action once to chamber a round, preparing the shotgun for firing.

Always verify the safety is engaged before handling the firearm and confirm proper shell retention by lightly bumping the shotgun’s stock.

IX. Chambering a Round

Chambering a round in the Remington 870 is a crucial step in preparing the shotgun for firing, and must be executed with deliberate safety. With the action securely locked open, verify the chamber is empty. Visually inspect it to confirm no shell is present.

Firmly grasp the forend with your non-dominant hand and smoothly pump the action forward and then fully rearward. This motion picks up a shell from the magazine tube and guides it into the chamber. Ensure a complete and positive chambering action; a partially chambered round will not fire reliably.

Listen for a distinct ‘click’ as the shell locks into the chamber. This confirms proper engagement. Maintain a firm grip on the forend throughout the process. After chambering, the action will remain locked open, ready for safe handling.

Always keep the muzzle pointed in a safe direction and maintain your finger off the trigger until ready to fire. Double-check the chamber to visually confirm the round is fully seated before proceeding.

X. Firing the Remington 870

Safe and responsible firing of the Remington 870 requires strict adherence to firearm safety principles. Before firing, ensure a clear line of fire and a safe backstop. Confirm the target is what you intend to shoot, and be aware of everything beyond it.

Maintain a firm grip on the shotgun with both hands. Your trigger finger should rest outside the trigger guard until you are ready to fire. Assume a stable shooting stance, bracing yourself for recoil. Focus your eyes on the target.

To fire, smoothly pull the trigger rearward. The action will cycle, ejecting the spent shell and chambering a new round from the magazine tube, if shells remain. Continue firing by repeating this trigger pull for each shot.

Be prepared for the recoil and maintain control of the shotgun throughout the firing sequence. After firing, immediately and safely unload the firearm. Always treat every firearm as if it is loaded.

XI. Pump-Action Mechanics Explained

The Remington 870’s pump-action system is renowned for its reliability and smooth operation. This mechanism relies on the manual cycling of the forend to load, unload, and eject shells. Pulling the forend rearward unlocks the bolt from the barrel extension.

As the forend continues rearward, the bolt moves back, extracting the spent cartridge case from the chamber and ejecting it through the ejection port. Simultaneously, the hammer is cocked, preparing for the next shot. A spring-loaded cartridge lifter within the magazine tube presents a fresh shell.

Pushing the forend forward returns the bolt to its locked position, chambering a new shell. This entire cycle – unlocking, extracting, ejecting, cocking, and chambering – occurs with each pump of the forend.

Proper lubrication is crucial for smooth pump action. Ensure the action bars and slide assembly are adequately lubricated to minimize friction and ensure reliable cycling. Regular cleaning prevents buildup of fouling that can impede operation.

XII. Disassembly for Cleaning

Regular cleaning is vital for maintaining the Remington 870’s performance and longevity. Before disassembly, always ensure the firearm is unloaded and pointed in a safe direction. Begin by removing the buttstock by depressing the sling swivel and pulling it downwards. This reveals the receiver.

Next, carefully slide the barrel forward off the receiver. The forend can then be removed by unscrewing the forend cap. With the forend removed, the slide assembly and action bars can be carefully pulled forward and out of the receiver.

The bolt can then be removed by rotating it 90 degrees and lifting it out. Pay attention to the orientation of all parts during disassembly to facilitate correct reassembly. It’s recommended to lay out the parts in an organized manner on a clean surface.

Detailed diagrams are available in the full instruction manual for visual guidance. Remember to consult the manual before attempting any disassembly beyond these basic steps.

XIII. Step-by-Step Disassembly Process

Begin with safety: verify the firearm is unloaded. First, depress the sling swivel and pull the buttstock down and away from the receiver. Next, gently slide the barrel forward, completely removing it from the receiver. Unscrew the forend cap – typically by turning it counter-clockwise – and slide the forend off the magazine tube.

With the forend removed, carefully pull the slide assembly and action bars forward, extracting them from the receiver. Rotate the bolt 90 degrees and lift it upwards to remove it. The extractor and ejector can then be carefully removed using appropriate tools, if necessary, for a deeper clean.

Document each step with photos if you’re a beginner. This aids reassembly. Note the position of springs and detents. Refer to detailed diagrams in the official Remington 870 manual for precise component placement. Avoid forcing any parts; resistance indicates something is incorrect.

Always work on a clean, well-lit surface to prevent losing small parts.

XIV. Cleaning and Lubrication

Thorough cleaning is vital for reliable Remington 870 operation. Begin by brushing out the bore with a bore brush, followed by patches soaked in appropriate solvent. Clean the receiver, bolt, and action bars, removing carbon buildup and old lubricant. Pay close attention to the gas ports and locking lugs.

Use a nylon brush to scrub the magazine tube and forend, ensuring smooth operation of the action. Inspect the extractor and ejector for debris, cleaning them meticulously. After cleaning, lightly lubricate key areas: the bolt, action bars, slide rails, and locking lugs.

Avoid over-lubrication, as this can attract dirt and grime. A thin coat of quality gun oil is sufficient. Wipe off any excess lubricant. Inspect all parts for wear or damage during cleaning. Regular cleaning prevents corrosion and ensures smooth cycling of the action.

Proper lubrication minimizes friction and extends the life of your Remington 870.

XV. Reassembly Instructions

Begin reassembly by carefully aligning the bolt with the receiver, ensuring the bolt lock engages correctly. Slide the forend onto the magazine tube, verifying smooth movement along the rails. Reattach the barrel, tightening the barrel nut to the manufacturer’s specified torque – avoid over-tightening.

Reinstall the trigger group, ensuring proper engagement with the hammer and sear. Carefully reassemble the safety mechanism, confirming it functions flawlessly. Replace the receiver cap, tightening it securely. Double-check all screws and pins for proper tightness.

Function check is crucial. Cycle the action several times, verifying smooth loading, unloading, and ejection. Test the safety mechanism in both safe and fire positions. Ensure the trigger resets correctly. A properly reassembled Remington 870 will operate smoothly and reliably.

If any issues arise during reassembly, consult the exploded diagram and repeat the process carefully.

XVI. Ensuring Proper Function After Reassembly

Post-reassembly, a thorough function check is paramount. Cycle the action repeatedly, observing smooth operation of the pump, bolt lock, and ejector. Load and unload several dummy rounds (or snap caps) to verify proper feeding and extraction without live ammunition.

Safety is key: Engage and disengage the safety mechanism multiple times, confirming it reliably locks the trigger. Test the trigger pull, ensuring a clean break. Inspect the magazine tube for any obstructions hindering shell flow.

Pay close attention to the forend’s movement; it should glide smoothly along the magazine tube without binding. Listen for any unusual clicks or grinding noises during operation, which may indicate improper assembly or a damaged part.

If issues persist, disassemble the shotgun again and meticulously review each step of the reassembly process. A properly functioning Remington 870 will exhibit smooth, reliable action and secure safety features.

XVII; Troubleshooting Common Issues

Remington 870 shotguns, while robust, can occasionally experience malfunctions. A common issue is failure to eject, often caused by a dirty or damaged ejector spring or a buildup of debris in the ejection port. Thorough cleaning and inspection are crucial first steps.

Failure to feed problems frequently stem from improper shell loading, a bent feed lip on the shell, or a dirty magazine tube. Ensure shells are correctly aligned and the magazine is free of obstructions. Inspect the shell’s crimp for damage.

Difficulty cycling the action can indicate a tight forend, insufficient lubrication, or a damaged action slide. Apply a quality gun lubricant to the action bars and forend rails. Check for any burrs or damage hindering movement.

If the safety doesn’t engage, avoid using the firearm and immediately consult a qualified gunsmith. Never attempt to modify or repair the safety mechanism yourself. Regular maintenance prevents many issues.

XVIII. Failure to Eject Issues

A failure to eject with your Remington 870 means the spent shell casing isn’t being expelled from the chamber after cycling the action. This is a common issue with several potential causes, demanding systematic troubleshooting.

The most frequent culprit is a dirty or corroded ejector. Thoroughly clean the ejector and the surrounding area with a quality gun solvent. Inspect the ejector spring for damage or weakness; a replacement may be necessary. Debris buildup in the ejection port can also obstruct shell removal.

Another possibility is a damaged or worn ejector claw. Examine the claw for cracks, chips, or excessive wear. A damaged claw won’t effectively grip and eject the shell. Ensure the action bars are properly lubricated, as friction can hinder the ejector’s movement.

Finally, improper ammunition can contribute to ejection failures. Use only ammunition that meets SAAMI specifications for the Remington 870. Always prioritize safety and consult a gunsmith if the problem persists.

XIX. Failure to Feed Problems

Experiencing a failure to feed with your Remington 870 means a shell isn’t being properly loaded into the chamber from the magazine tube. This can be frustrating, but often stems from easily identifiable issues requiring careful attention.

A common cause is a dirty or obstructed magazine tube. Thoroughly clean the magazine tube and follower with a suitable gun solvent, removing any dirt, debris, or old lubricant. Ensure the follower is moving freely within the tube; a sticky follower prevents reliable feeding.

Inspect the shell latch and carrier for damage or wear. A worn latch may not securely hold the shell, leading to a misfeed. Verify the carrier is properly aligned and functioning smoothly. Lubricate these components with a quality gun oil.

Using incorrect ammunition can also cause feeding issues. Always use shells that meet SAAMI specifications for the Remington 870. Finally, confirm the action bars are properly lubricated to ensure smooth cycling. If problems persist, seek professional gunsmith assistance.

XX. Maintenance Schedule

Consistent maintenance is crucial for the longevity and reliable operation of your Remington 870. A regular schedule ensures optimal performance and prevents potential malfunctions. Following this guide will help maintain your shotgun in peak condition.

After each use, wipe down the exterior metal surfaces with a lightly oiled cloth to prevent rust. Inspect the bore for any residue and clean it accordingly. A quick check of the action bars for lubrication is also recommended.

Every 100-200 rounds fired, perform a more thorough cleaning. Disassemble the shotgun (refer to disassembly instructions) and clean all parts with a quality gun solvent. Pay close attention to the receiver, action bars, and magazine tube.

Annually, or after extended periods of non-use, conduct a complete disassembly and inspection. Check for wear and tear on critical components, and replace any worn parts. Re-lubricate all moving parts before reassembly. Proper storage in a dry environment is also essential.

XXI. Long-Term Storage Guidelines

Proper long-term storage is vital to preserve the functionality and value of your Remington 870. Neglecting this can lead to corrosion, damage, and reduced performance. Follow these guidelines for optimal preservation.

Before storing, thoroughly clean and lubricate the shotgun as outlined in the maintenance schedule. Ensure the action is dry and free of any cleaning solvents. A light coat of oil on all metal surfaces will prevent rust.

Storage Location: Choose a cool, dry location with stable temperature and humidity. Avoid areas prone to moisture, extreme temperature fluctuations, or direct sunlight. A gun safe or secure cabinet is highly recommended.

Protection: Store the Remington 870 in a protective case or gun sock to shield it from dust, scratches, and accidental impacts. Consider using desiccant packs inside the case to absorb any residual moisture. Periodically check the stored firearm for any signs of corrosion or deterioration.

XXII. Warranty Information and Support

Remington offers a warranty on the 870 shotgun, protecting against defects in materials and workmanship. The specific terms and duration of the warranty can vary, so it’s crucial to review the documentation included with your firearm at the time of purchase.

Warranty Coverage: Generally, the warranty covers manufacturing defects that occur during normal use. It does not cover damage resulting from misuse, abuse, improper maintenance, modifications, or ammunition issues. Keep your proof of purchase, as it’s required for warranty claims.

Support Resources: For warranty claims or technical support, contact Remington directly through their official website or customer service hotline. Their website provides FAQs, troubleshooting guides, and contact information. Authorized Remington service centers can also provide repairs and assistance.

Registration: Registering your Remington 870 online allows Remington to notify you of important safety updates, recalls, and warranty information. It also streamlines the warranty claim process if needed. Always prioritize safe handling and responsible ownership.