This component is the central structure connecting the pump-action mechanism to the forend (or forearm) of this popular shotgun. It typically consists of a metal tube attached to the receiver, along with a spring and follower that facilitate the back-and-forth movement required for cycling rounds. Different models and configurations exist, accommodating various forend styles and aftermarket modifications.
Proper function of this crucial element is essential for reliable operation and smooth cycling of the firearm. It ensures consistent feeding and ejection of shells, contributing to the shotgun’s effectiveness. Over time, wear and tear can impact performance, highlighting the importance of maintenance and potential replacement. The evolution of this component reflects advancements in materials and design, enhancing durability and user experience.
Further exploration will cover topics such as common issues, maintenance procedures, aftermarket options, and compatibility with various Remington 870 models.
1. Function
The function of the Remington 870 forend tube assembly is paramount to the shotgun’s operation. This mechanism facilitates the cycling of shells, enabling the weapon to fire repeatedly. A properly functioning assembly is critical for reliable feeding, chambering, and ejection of cartridges.
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Pump Action Cycling
The primary function is to enable the pump-action mechanism. The forend, attached to the tube assembly, slides back and forth along the tube. This motion actuates the internal components of the shotgun, ejecting spent shells and loading fresh rounds into the chamber. A smooth, unimpeded movement is crucial for reliable cycling and prevents malfunctions.
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Shell Feeding and Chambering
As the forend is moved rearward, the action unlocks, and the spent shell is ejected. Simultaneously, the forend’s movement draws a fresh shell from the magazine tube. On the forward stroke, the new shell is pushed into the chamber, readying the shotgun for firing. This intricate process relies heavily on the precise dimensions and smooth operation of the forend tube assembly.
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Magazine Retention
The tube itself serves as the housing for the magazine spring and follower, which retain and feed the shells into the receiver. The assembly ensures that cartridges are held securely and presented correctly for feeding. This function is crucial for preventing misfeeds and ensuring consistent operation.
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Forend Stability and Control
Beyond its mechanical function, the assembly provides a stable platform for the forend. This stability is essential for user control during operation. A secure and properly fitted forend allows for comfortable and efficient pumping action, contributing to accurate and rapid firing.
These interconnected functions highlight the critical role of the forend tube assembly in the overall performance of the Remington 870. Any malfunction or damage to this component can significantly impact the shotgun’s reliability and usability. Understanding its function is essential for proper maintenance and troubleshooting.
2. Components
The Remington 870 forend tube assembly comprises several key components working in concert to ensure reliable operation. Understanding these individual parts and their interaction is crucial for maintenance, troubleshooting, and potential modifications.
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Forend Tube
The tube itself is the backbone of the assembly, typically constructed from steel. It provides the platform along which the forend slides, guiding the pump action. The tube’s internal diameter dictates compatibility with the magazine spring and follower. Different tube lengths accommodate varying magazine capacities.
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Magazine Spring
This spring exerts pressure on the follower and shells within the magazine tube. It ensures consistent upward pressure on the cartridges, facilitating reliable feeding into the receiver. Spring tension is critical for proper function; a weakened or damaged spring can lead to malfunctions.
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Follower
The follower is a component positioned at the front of the magazine spring. It directly contacts the shells and pushes them forward towards the receiver as the action cycles. Followers are typically made from polymer or metal and are designed to withstand wear and tear. A worn or damaged follower can cause feeding issues.
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Forend Cap/Nut
This component secures the forend tube assembly to the receiver. It typically screws onto the end of the tube, holding it firmly in place. Proper tightening of the cap/nut is essential to maintain stability and prevent loosening during operation. Some models incorporate a detent or other retention mechanism within the cap/nut.
These components, while individually simple, work together to perform a complex function. The interplay between the tube, spring, follower, and cap ensures reliable feeding and cycling of the shotgun. Regular inspection and maintenance of these parts are crucial for ensuring the continued performance and longevity of the Remington 870.
3. Maintenance
Maintaining the Remington 870 forend tube assembly is crucial for ensuring the shotgun’s reliability and longevity. Neglecting this critical component can lead to malfunctions, reduced performance, and potentially dangerous situations. Regular maintenance practices prevent issues and contribute to the smooth operation of the firearm.
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Cleaning
Regular cleaning removes fouling, dirt, and debris that can accumulate within the tube assembly and impede function. This involves disassembling the assembly, cleaning the tube, spring, and follower with appropriate solvents and lubricants. Accumulated debris can restrict the movement of the forend and interfere with the feeding and ejection of shells.
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Inspection
Careful inspection of the components is essential for identifying wear, damage, or potential issues. This includes checking the tube for dents or cracks, examining the spring for deformation or weakness, and assessing the follower for wear or breakage. Early detection of problems can prevent more significant malfunctions and ensure continued reliable operation.
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Lubrication
Proper lubrication of the tube, spring, and follower reduces friction and ensures smooth operation. Applying a thin layer of gun lubricant to these components facilitates the forend’s movement and prevents binding. Over-lubrication, however, can attract dirt and debris, so moderation is key.
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Replacement of Worn Parts
Over time, components like the spring and follower can wear out, requiring replacement. A weakened spring may not provide sufficient pressure for reliable feeding, while a worn follower can cause misfeeds or jams. Replacing these parts proactively ensures continued optimal performance and prevents potential malfunctions.
These maintenance practices are essential for preserving the functionality and extending the lifespan of the Remington 870 forend tube assembly. Regular attention to these details contributes significantly to the shotgun’s overall reliability and safe operation. Neglecting these procedures can compromise performance and potentially create hazardous situations.
4. Compatibility
Compatibility is a critical factor when considering Remington 870 forend tube assemblies. Not all assemblies are interchangeable between different models and configurations of this shotgun. Variations in barrel length, magazine capacity, and forend style necessitate careful consideration of compatibility to ensure proper fit and function. Selecting an incompatible assembly can lead to malfunctions, feeding issues, and potentially dangerous situations. Understanding the nuances of compatibility is essential for maintaining the shotgun’s reliability and safety.
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Barrel Length and Magazine Capacity
Different barrel lengths often correspond to varying magazine tube lengths. A forend tube assembly designed for a shorter barrel may not be compatible with a longer barrel and its corresponding magazine tube. Similarly, assemblies for extended magazine tubes will not function correctly with standard capacity tubes. Matching the assembly to the barrel and magazine configuration is essential for proper feeding and cycling.
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Forend Style and Attachment Mechanism
Remington 870 forends come in various styles, including classic wood, synthetic, and tactical designs. Each style may have a different attachment mechanism to the forend tube assembly. Some use a simple friction fit, while others incorporate a screw-on cap or other retention system. Selecting an assembly compatible with the specific forend style ensures a secure and stable connection.
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Aftermarket Modifications and Accessories
Numerous aftermarket modifications and accessories exist for the Remington 870, including extended magazine tubes, tactical forends, and specialized components. Compatibility between these aftermarket parts and the forend tube assembly is crucial. Modifications can alter the dimensions and functionality of the assembly, requiring careful consideration of compatibility to avoid malfunctions or damage.
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Manufacturing Variations and Generations
Even within the same model designation, subtle variations can exist between different generations or production runs of the Remington 870. These variations may affect the dimensions and specifications of the forend tube assembly. Consulting manufacturer documentation or seeking expert advice can help ensure compatibility when dealing with older or less common variants.
Careful attention to compatibility is paramount when selecting and installing a Remington 870 forend tube assembly. Ignoring these factors can lead to a range of issues, from minor inconveniences to potentially dangerous malfunctions. Ensuring compatibility between the assembly and the specific shotgun configuration is essential for maintaining reliability, safety, and optimal performance.
5. Modifications
Modifications to the Remington 870 forend tube assembly offer significant potential for customization, enabling users to tailor the shotgun to specific needs and preferences. These modifications can enhance functionality, improve ergonomics, and adapt the weapon to various applications. However, modifications require careful consideration of compatibility and potential impacts on reliability and safety.
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Extended Magazine Tubes
Extended magazine tubes increase ammunition capacity, allowing for more rounds before reloading. These modifications are popular for home defense, competitive shooting, and tactical applications. However, extended tubes can alter the balance and handling of the shotgun, requiring adjustments to shooting technique. Compatibility with specific forend assemblies and barrel lengths is crucial for proper function and safety.
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Tactical Forends and Accessories
Tactical forends often feature integrated rails for mounting accessories like lights, lasers, and vertical grips. These modifications enhance versatility and allow for customization based on user needs. However, adding accessories can increase the weight and bulk of the forend, potentially impacting handling and maneuverability. Compatibility with the existing tube assembly is essential for secure attachment and proper function.
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Replacement Forend Tubes
Replacing the standard forend tube with an aftermarket option can offer improvements in durability, weight reduction, or compatibility with specific accessories. For example, some aftermarket tubes are constructed from lighter materials like aluminum or feature enhanced corrosion resistance. Careful selection is crucial to ensure compatibility with the existing forend and other components.
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Custom Springs and Followers
Upgrading the magazine spring and follower can improve feeding reliability and enhance performance with specific ammunition types. For instance, heavier springs may be necessary for reliable feeding of low-recoil or specialty shells. Matching the spring and follower to the specific ammunition and magazine tube configuration is crucial for optimal function.
While modifications to the Remington 870 forend tube assembly offer significant potential for customization, they should be undertaken with careful consideration. Compatibility, reliability, and safety implications must be thoroughly evaluated before implementing any modifications. A well-chosen modification can enhance the shotgun’s performance and adaptability, while an ill-considered change can compromise function and potentially create hazardous situations.
Frequently Asked Questions
This section addresses common inquiries regarding the Remington 870 forend tube assembly, providing concise and informative responses to clarify potential uncertainties and misconceptions.
Question 1: How frequently should the forend tube assembly be cleaned?
Cleaning frequency depends on usage and environmental conditions. Regular cleaning, especially after exposure to dirt, moisture, or heavy use, is recommended. A general guideline is to clean the assembly every time the shotgun itself is cleaned.
Question 2: What are common signs of a worn or damaged forend tube assembly?
Common signs include difficulty pumping the action, binding or sticking of the forend, misfeeds, and failure to eject shells. A loose or wobbly forend can also indicate a problem with the assembly.
Question 3: Can different gauge Remington 870s use the same forend tube assembly?
No, different gauge Remington 870 shotguns utilize distinct forend tube assemblies. The 12-gauge, 20-gauge, and .410 bore versions each have unique assemblies that are not interchangeable. Using an incorrect assembly can lead to malfunctions and safety hazards.
Question 4: Are aftermarket forend tube assemblies always superior to factory-original components?
Not necessarily. While aftermarket assemblies may offer features like lighter weight or increased capacity, they may not always match the quality and reliability of factory-original parts. Careful research and selection are essential when considering aftermarket components.
Question 5: What tools are typically required for disassembling and reassembling the forend tube assembly?
Basic tools like a screwdriver and a punch may be sufficient for most disassembly and reassembly tasks. However, specific models or aftermarket modifications may require specialized tools. Consulting manufacturer instructions or seeking expert guidance is recommended.
Question 6: Can extending the magazine tube affect the legality of a Remington 870?
Local and national regulations regarding firearm modifications, including magazine capacity restrictions, vary significantly. It is essential to research and comply with all applicable laws and regulations before modifying any firearm.
Understanding these common points of inquiry is essential for proper maintenance, modification, and safe operation of the Remington 870 shotgun. Consulting qualified gunsmiths for further assistance is always recommended for complex issues or when in doubt.
The next section will delve into specific troubleshooting tips and solutions for common issues encountered with the Remington 870 forend tube assembly.
Troubleshooting Tips
This section offers practical guidance for addressing common issues encountered with Remington 870 forend tube assemblies. These troubleshooting tips aim to assist in diagnosing and resolving problems, promoting safe and reliable operation.
Tip 1: Forend Binding or Sticking
If the forend binds or sticks during operation, the likely culprit is insufficient lubrication or accumulated debris within the tube assembly. Disassemble the assembly, thoroughly clean all components, and apply a thin layer of appropriate gun lubricant to the tube, spring, and follower.
Tip 2: Difficulty Cycling the Action
Difficulty cycling the action can indicate a problem with the magazine spring, follower, or the tube itself. Check the spring for weakness or damage, inspect the follower for wear or breakage, and examine the tube for dents or obstructions. Replace any worn or damaged parts.
Tip 3: Misfeeds or Jams
Misfeeds or jams often result from a worn or damaged follower, a weak magazine spring, or an incompatibility between the assembly and the ammunition being used. Inspect the follower and spring for wear, and ensure compatibility with the ammunition type. Consider a stronger spring if using low-recoil shells.
Tip 4: Loose or Wobbly Forend
A loose or wobbly forend indicates a problem with the forend cap/nut or the attachment mechanism between the forend and the tube assembly. Check the cap/nut for proper tightness and ensure that it is correctly engaged with the tube. Inspect the forend for damage or wear that might compromise its secure attachment.
Tip 5: Excessive Noise During Operation
Excessive noise during operation, such as rattling or grinding sounds, can suggest loose components, worn parts, or insufficient lubrication. Inspect all components for wear, ensure proper lubrication, and check for any loose parts within the assembly.
Tip 6: Failure to Eject Shells
Failure to eject shells can be caused by a variety of factors, including a faulty ejector, a weak magazine spring, or a problem with the forend tube assembly. Inspect the ejector for damage, check the spring for weakness, and ensure the forend is moving freely and fully along the tube.
Addressing these common issues through careful inspection, cleaning, lubrication, and replacement of worn parts contributes significantly to the reliable and safe operation of the Remington 870. If problems persist after attempting these troubleshooting steps, consulting a qualified gunsmith is recommended.
This concludes the troubleshooting section. The following section will provide concluding remarks and summarize key takeaways regarding the Remington 870 forend tube assembly.
Concluding Remarks on the Remington 870 Forend Tube Assembly
This exploration of the Remington 870 forend tube assembly has highlighted its crucial role in the shotgun’s function, emphasizing the interplay of components, the importance of maintenance, and the potential for modifications. From the core function of cycling rounds to the nuances of compatibility and troubleshooting, a comprehensive understanding of this assembly is essential for responsible ownership and operation. Key takeaways include recognizing the impact of individual components like the tube, spring, and follower on overall performance, understanding the significance of regular cleaning and inspection, and appreciating the complexities of compatibility between different models and modifications.
Ultimately, proper care and attention to the Remington 870 forend tube assembly contribute significantly to the shotgun’s reliability, longevity, and safe operation. Continued learning and adherence to best practices are crucial for ensuring optimal performance and mitigating potential issues. This knowledge empowers users to maintain their firearms effectively and make informed decisions regarding modifications and upgrades, promoting responsible gun ownership and safe handling practices.