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Parts of the Firearm

Congratulations on your choice of a Remington.® With proper care, it should give you many years of dependable use and enjoyment. For best results, we recommend that you use Remington Ammunition – the ammunition used in factory testing your firearm against our exacting function and performance standards.

PICTURE A: This picture shows the main parts of a REMINGTON MODEL 870™ PUMP ACTION SHOTGUN. The picture will aid in understanding the instructions in this book.

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Picture B: This picture shows the parts of the ammunition.

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Overview

Learn the important components of your Pump Action Model 870 firearm.

Important Parts of the Firearm

The Safety Mechanism

The safety mechanism on the Model 870™ Pump Action Shotgun is a button located behind the trigger, commonly known as a cross-bolt safety. See Picture 1.

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The safety mechanism provides protection against accidental or unintentional discharge under normal usage when properly engaged and in good working order.

To engage the safety mechanism, push the button so the RED BAND MARKING CANNOT BE SEEN.

Always engage the safety mechanism when the firearm is loaded and you do not intend to shoot.

Never pull the trigger when the safety mechanism is engaged.

When you are ready to fire the firearm, press the safety mechanism so that the RED BAND MARKING IS SHOWING.

Do not touch the trigger while moving the safety mechanism. Your fingers and all other objects should be kept outside of the trigger guard and away from the trigger until you are actually ready to fire by pulling the trigger.

WARNING! The firearm will fire when the trigger is pulled and the RED BAND MARKING IS SHOWING.

Even when the safety mechanism is engaged, careless handling can cause the firearm to fire. See Ten Commandments of Firearm Safety.

The Security System

The firearm you have purchased is equipped with an integrated security system. The security system enables the owner to lock the safety mechanism on the firearm in the “SAFE” position with the use of a special key.

THIS SECURITY SYSTEM DOES NOT ELIMINATE THE NEED FOR SAFE GUN HANDLING AND STORAGE, INCLUDING KEEPING THIS AND EVERY GUN UNLOADED AND LOCKED IN A SECURE PLACE WHEN NOT IN USE. READ AND FOLLOW THESE AND OTHER SAFETY RULES IN THIS INSTRUCTION BOOK. FAILURE TO READ, UNDERSTAND AND OBEY THESE RULES CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH TO YOU OR OTHERS. SEE THE TEN COMMANDMENTS OF FIREARM SAFETY.

The safety mechanism on the firearm you have purchased is a button located behind the trigger, commonly known as the cross-bolt safety. See Picture 1.

The safety mechanism provides additional protection against accidental or unintentional discharge under normal usage when properly engaged and in good working order.

On the safety mechanism there is a “J” shaped slot. See Picture 2. This “J” slot is the key hole for securing your safety mechanism. Also on the safety mechanism is a pointer which will point and line up with either the RED or WHITE DOT on the trigger plate when the safety mechanism is turned. See Picture 2. The position of the pointer indicates whether or not the security system is engaged. The existence of the security system does not change the basic operation of the safety mechanism, nor does it change the manner in which the safety mechanism should be used.

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With your new firearm you will receive a capped key. To use the key remove the cap. On the key is an indicator line which will line up with the pointer on the safety mechanism. See Picture 3.

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To engage the security system, press the safety mechanism to the “SAFE” position so the RED BAND DOES NOT SHOW. Insert the key into the “J” slot as far as it can go. Next, turn the key counter-clockwise so that the indicator line on the key and the pointer on the safety mechanism line up with the WHITE DOT on the trigger plate.

THE SECURITY SYSTEM IS NOW ENGAGED.

In operating the security system, NEVER use excessive force to turn the key. If the key will not turn freely, contact a Remington® authorized repair center.

Keep your security system engaged and your safety mechanism in the “SAFE” position when your firearm is not in use. Keep your key in a secure place, inaccessible to others. DO NOT leave your key or any ammunition with your firearm, which should be kept unloaded and locked in a safe place.

If you lose the key, DO NOT attempt to disengage the safety mechanism using a foreign object. This will damage your firearm. Contact your Remington authorized dealer for a replacement key.

Even if you think the security system and safety mechanism are engaged, careless handling can cause the firearm to fire. See the Ten Commandments of Firearm Safety.

The Fore-End

The fore-end is used to pull the bolt rearward to open the action.

TO OPEN THE ACTION:

  1. Push upward on the action bar lock. See Picture 4.
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  2. Pull the fore-end rearward to open the action.

WARNING! When the fore-end is forward, the action is closed and the firearm can be fired.

The Trigger

Pulling the trigger fires the firearm.

The weight of the trigger pull is preset at the factory. All adjustments to the trigger and trigger plate assembly must be made by the factory or a REMINGTON RECOMMENDED GUNSMITH.

WARNING! NEVER put your finger on the trigger unless you are going to fire the firearm.

BARREL INTERCHANGEABILITY:

NOTE: All Model 870™ 12-gauge barrels are interchangeable without adjustment, except the Model 870 12-gauge Super Magnum™ and Model 870 12-gauge Special Field.

WARNING! BEFORE LOADING, ALWAYS CHECK THE BARREL MARKING FOR THE CORRECT GAUGE AND CHAMBER LENGTH. NEVER USE AMMUNITION WHICH EXCEEDS THE CHAMBER LENGTH SHOWN ON THE BARREL.

The Barrel

The inside of the barrel must be clean and free of obstructions.

I. TO CHECK THE INSIDE THE BARREL:

WARNING! Look into the ejection port. Check the chamber and magazine to make sure there are no shells in the firearm.

  1. Point the firearm in a safe direction.
  2. Engage the safety mechanism. Make sure the RED BAND IS NOT SHOWING.
  3. Pull the fore-end fully rearward to open the action.
  4. Insert a cleaning rod into the muzzle. Push the cleaning rod all the way through the barrel, until the rod can be seen in the ejection port.

II. TO REMOVE AN OBJECT FROM INSIDE THE BARREL:

WARNING! NEVER try to remove an object from the barrel by loading a cartridge and firing. This may cause the barrel to burst or a cartridge case to rupture and cause serious personal injury or serious damage to the firearm and injury or death to the shooter or bystanders.

  1. Remove the barrel following the instructions on the Cleaning, Lubrication, and Maintenance page.
  2. Use the correct cleaning rod.
  3. Insert a cleaning rod into the muzzle and lightly tap rod to free objects.
  4. If an object cannot be easily pushed out of the barrel with a cleaning rod, return the firearm to the factory or a REMINGTON® RECOMMENDED GUNSMITH.

III. TO CLEAN THE BARREL AND CHOKE TUBE FOLLOW THE INSTRUCTIONS SHOWN ON THE CLEANING, LUBRICATION, AND MAINTENANCE PAGE.

BEFORE LOADING THE FIREARM:

Make sure the inside of the barrel is free of dirt or other objects.

TO CHANGE THE CHOKE TUBE:

WARNING! UNLOAD the firearm before changing choke tubes. Leave the action OPEN and the chamber and magazine EMPTY.

  1. Point the firearm in a safe direction.
  2. Engage the safety mechanism. Make sure the RED BAND IS NOT SHOWING.
  3. Place the choke tube wrench into the choke tube.
  4. Turn the wrench counter-clockwise and remove the choke tube.
  5. Select the desired choke tube and insert the tube into the barrel.
  6. Tighten the choke tube snugly, but DO NOT OVERTIGHTEN.
  7. With the action open and the chamber and magazine empty, check the choke tube occasionally to make sure the tube has not loosened.

NOTE: NEVER fire the firearm without the choke tube installed.

How To Assemble

The Model 870™ Pump Action Shotgun is shipped with the barrel assembly removed. See Picture 5 for location of parts.

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WARNING! DO NOT pump the action or pull the trigger repeatedly with the barrel removed.

  1. Before assembling, clean the barrel following instructions on the Cleaning, Lubrication, and Maintenance page.
  2. Unscrew and remove the magazine cap.
  3. Remove the cardboard packing ring from the magazine tube. See Picture 5.
  4. Press upward on the action bar lock. See Picture 4. Pull the fore-end approximately halfway rearward.
  5. Hold the barrel ahead of the barrel guide ring. See Picture 6.
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  6. Slide the barrel guide ring over the magazine tube.
  7. Align the ejector cut on the rear of the barrel with the ejector in the receiver. See Picture 7.
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  8. Carefully seat the barrel into the receiver. DO NOT force the barrel against the ejector.
  9. Replace and tighten the magazine cap.
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