Application of the Remington 870 pump-action shotgun as one of the most widely used versatile shotguns throughout the world exists. This shotgun serves hunters along with law enforcement and shooting enthusiasts thanks to its known reliable design and strong construction. People who own Remington 870 products often install fiber optic sights onto the rail system to achieve precise shooting under different illumination levels.
When maintainance or repair needs arise or you wish to install an upgraded sight the fiber optic sight on the rail might require removal. Detailed instructions contained in this guide will teach users proper steps to safely and efficiently remove Remington 870 fiber optic sights from their rails.
What Is the Remington 870?

A Trusted Shotgun for Decades
In 1950 Remington introduced its pump-action shotgun model 870 to the market. The Remington 870’s robust manufacturing along with high operational ease and versatile functionality keeps this instrument among the most preferred weapons across hunting and home protection usage along with competitive shooting activities.
Why Add a Fiber Optic Sight?
When installing a fiber optic sight on the Remington 870 you obtain better accuracy through simpler target locking thanks to this setup during low illumination conditions. Fiber optic technology permits shooters to find and focus on their targets rapidly through comprehensive sight illumination.
What Is a Fiber Optic Sight on a Rail?
Fiber Optic Sights Explained
The light-generated fibers inside a fiber optic sight generate an obvious aiming point. An exceptional feature of these sights makes them visible under different light conditions.
Mounted on a Rail
The Remington 870 rifle permits owners to install adjustable fiber optic sights through its Picatinny or Weaver rail mounting system. Addition of other optics becomes possible using this mount configuration.
Why Remove a Fiber Optic Sight from the Rail?

1. Replacement or Upgrade
Most gun owners choose to buy better sights or transition from traditional sights to red dot optics.
2. Maintenance and Cleaning
Dirt with debris will slowly build up in the areas surrounding the sight. The sight’s removal enables complete maintenance and visual inspections of both the sight itself along with the rail.
3. Adjustments or Repairs
Through sight removal it becomes possible to perform desired adjustments or fix any issues when your sight displays loose or misaligned or damaged performance.
Tools You’ll Need
1. Screwdriver Set
The tool ensemble includes flathead and Phillips screwdrivers used to gain and restore screw tension.
2. Hex Keys or Allen Wrenches
The majority of fiber optic sights use hex screws secured with Allen wrenches for maintenance.
3. Gun Cleaning Kit
The cleaning of both the rail and surrounding area follows the sight removal process.
4. Threadlocker (Optional)
Threadlocker will help maintain screw security during the sight reinstallation process.
Safety Precautions Before Removing the Sight

1. Unload the Shotgun
Verify the Remington 870 contains no ammunition whatsoever. Empty the chamber as well as the magazine of all ammunition before proceeding.
2. Check the Safety
Banish the shotgun’s safety to stop unintended firing incidents.
3. Work in a Safe Environment
Carry out this procedure inside a clean area which provides adequate lighting and maintains free safety from distractions.
Step-by-Step Instructions for Removing a Fiber Optic Sight on Rail
Step 1: Inspect the Rail and Sight
Observe both sight and rail to determine how the fiber optic sight connects to the mount. The majority of sights utilize screw mounts or clamp systems.
Step 2: Gather the Correct Tools
The screws on your fiber optic sight need the right hex key or screwdriver to properly uninstall them.
Step 3: Loosen the Mounting Screws
Use your finger to find the screws attaching the sight to the mounting rail.
Using either a screwdriver or Allen wrench as needed you should carefully loosen all screws.
Hold the sight firmly with one hand while you loosen the mount to stop it from falling.
Step 4: Remove the Sight
After completely loosening the screws on your fiber optic sight you should carefully pull it upward from the mounting rail.
Keep your hands steady preventing any touch to the rail while being removed to minimize scratches and damage.
Step 5: Inspect the Rail
Check the rail surface for debris after you remove the sight. Make sure to examine it for signs of damage or dirt. The rail needs complete cleaning using a gun cleaning kit.
Tips for Reinstalling or Replacing the Sight
1. Use Threadlocker for Stability
Apply threadlocker onto screws through a small quantity to guarantee solid mounting of the sight.
2. Align the Sight Correctly
A proper sight alignment of the fiber optic lens must be achieved prior to secure tightening of screws to prevent inaccurate shots.
3. Do Not Over-Tighten
Apply a moderate torque to the screws then stop since excessive force could damage the rail or strip the threads.
Common Issues and Solutions
1. Stuck Screws
Inject penetrating oil onto screw connections that resist normal movement.
Grab the screwdriver firmly without allowing it to damage sticking screws during insertion.
2. Misaligned Rail
Contact a trained gunsmith when you notice rail issues because they can perform either repairs or replacements professionally.
3. Damaged Fiber Optic Rods
Replace your optic sight with a completely new unit due to cracked plastic fiber optics inside.
Cleaning and Maintenance After Sight Removal
1. Clean the Rail
A soft brush combined with gun cleaning solvent will successfully wash out dirt particles from the rail.
2. Inspect for Wear
You need to examine screws along with mounting points for indications of degeneration and damage. Replace any worn components.
3. Lubricate the Area
Lightly coat the rail with gun oil to stop rust development and corrosion formation.
Upgrading Your Fiber Optic Sight
Choosing a New Sight
When upgrading, consider factors such as:
Brightness: Select a sight which uses rods with high visibility properties.
Durability: New sights should be designed to handle the impact of recoil alongside harsh environmental conditions.
Compatibility: Make sure your sight works with your rail system.
Installation of a New Sight
You must install your new sight by using the guidance provided by the manufacturer. Repeat the same installation procedures you used earlier to secure the new sight.
The Benefits of a Fiber Optic Sight on the Remington 870
Enhanced Target Acquisition
The precision quality of fiber optic sights improves significantly because they deliver sharp and bright reticles which enhance accuracy during reduced visibility conditions.
Easy Customization
users can quickly perform modification tasks through the rail system that allows simple transitions between various sights or attachment of accessories to the Remington 870.
Improved Shooting Confidence
Improved aiming visibility together with exact alignment makes shooters feel confident and accurate during their shooting aim.
FAQs
1. What method should I use to remove a fiber optic sight installed on my Remington 870’s rail?
Gently raise the sight off its rail following screw removal using a screwdriver or hex key.
2. I require threadlocker for reinstalling the sight but it is optional.
A recommendable application of threadlocker helps secure the screws since recoil conditions can loosen them.
3. When screws become stuck what action should I take?
Penetrating oil should become part of your repair process before attempting screw loosening with a firmly held screwdriver.
4. Does this gun system allow me to install alternate optic types instead of a fiber optic sight?
The rail system supports multiple optic types with red dot sights and holographic sights alongside other compatible models.
5. I need to clean the rail along with the sight what frequency?
Open and cleaning procedures on rail components need special attention after long-term use and should be done whenever the sight shows signs of dirt or moisture exposure.
Final Thoughts
The correct procedure allows anyone to remove a fiber optic sight from your Remington 870 rail effortlessly. These step-by-step instructions lead to safe and efficient shotgun work when you need to clean or upgrade or perform maintenance operations.
The proper maintenance of Remington 870 shotguns combined with their accessories enables you to achieve peak performance and aim accuracy in all hunting defense and competitive shooting applications. A basic knowledge combined with appropriate tools will help you sustain your shotgun’s optimal state for numerous years.