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Restoring your Remington Model 870 Express Shotgun through Ultrasonic Cleaning

One of the best-selling shotguns in America, the Remington Model 870 Express shotgun is famous for its dependability and durability. Featuring versatility and rugged reliability, this Remington pump shotgun is a 12-gauge firearm with an 18 inch fixed Cylinder choke barrel with a single front bead sight. The Remington 870 Express pump shotgun provides smooth non-binding action with its twin action bar design. Offering options of 5-shot or 7-shot capacities, the Remington Model 870 Express shotgun is designed with a non-glare matte finish and can serve as the base for customized design. For top-notch working condition, don’t forget to properly and regularly maintain the Remington 870 Express shotgun, including cleaning even the internal parts of the firearm.

If you own or service a Remington 870 Express Shotgun or similar firearms you will definitely appreciate how an ultrasonic gun cleaner can save time and effort when it comes to cleaning and maintaining the weapon. An ultrasonic weapons cleaner is fast, thorough and safe because unlike some solvent washers and aerosol sprays, today’s ultrasonic gun cleaning solution is biodegradable, minimizing disposal problems with spent solutions.

Here you will learn:

  • How an Ultrasonic Gun Cleaner Works
  • How to Select and Set Up your Ultrasonic Weapon Cleaner
  • How to Disassemble, Clean and Reassemble your Remington 870 Express Shotgun

How an Ultrasonic Gun Cleaner Works

Ultrasonic cleaners are used in a wide range of applications to remove virtually any soil or contamination with the power of cavitation action. Cavitation action describes the implosion of billions of minute bubbles in the ultrasonic cleaning solution as they contact all components of your Remington 870 Express shotgun. The bubbles are created by generator-powered ultrasonic transducers bonded to an ultrasonic cleaning tank and typically operate at an ultrasonic frequency of 37 to 42 kHz (37,000 to 42,000 cycles per second).

The imploding bubbles quickly and safely remove grease, powder residues and other contaminants that could interfere with reliable operation of your Remington 870 Express shotgun. So tiny are the bubbles that they penetrate minute cracks, crevices and blind holes impossible to reach with conventional hand gun cleaning tools. The ultrasonic weapons cleaner will complete the job in less than 15 minutes. Meanwhile you can attend to other activities.

How to Select and Set Up your Ultrasonic Handgun Cleaner

A bench or table-top ultrasonic cleaner such as the LR617 along with its lubricating pan is ideal for sporting goods shops, servicing departments and the serious hand gun collector cleaning one or two handguns at a time. Whatever the model and size ultrasonic handgun cleaner you use there are steps to take before you start the cleaning operation by following the manufacturer’s operating instructions.

  1. Fill the ultrasonic weapons cleaner tank to the fill line (or approximately 2/3 full) with water and an ultrasonic cleaning concentrate diluted per manufacturer’s instructions. We recommend CLN-LR215 diluted 1 part to 10 parts of water.
  2. In the same way, fill the auxiliary lubricating pan with an ultrasonic gun lubricating solution and place it into the ultrasonic cleaner tank. Ready-to-use CLN-LR212 is a good choice. Make certain that the bottom of the lubricating pan is in contact with the cleaning solution.
  3. Turn on the ultrasonic cleaner and operate the unit for about 30 minutes to drive off cavitation inhibiting entrained air in both the cleaning solution and the lubricating solution. Degassing is complete when bubbles stop coming to the surface. Note that this step must be performed every time you use fresh cleaning or lubricating solutions.

How to Disassemble, Clean and Reassemble your Remington 870 Express Shotgun

Step 1: Disassembling the Remington 870 Express Shotgun

Safety tip! Make sure the weapon is not loaded by checking both the chamber and the magazine.

Rotate and remove the knot at the end of the magazine. Move the slide partway down the barrel and remove the barrel. To remove the bolt and bolt carrier from the receiver, press on the lifting arm. On the left side of the receiver, push in on the shelf stop and slip out the slide. The bolt should drop out. On the slide, remove the bolt and the carrier from the two bars.

Next is the trigger assembly. Push out the two receiver pins above the trigger. You may need to drive it out using a punch and hammer, or pull them out with pliers. Pull out the trigger assembly. On the magazine, use a punch or screw driver to wriggle out the cap at its end. Remove the magazine spring and the follower.

Voila! You have successfully disassembled your Remington 870 Express shotgun. Its parts are now ready to be cleaned using an ultrasonic cleaner.

Step 2: Cleaning the Remington 870 Express Shotgun

Use the weapons kit brushes and tools to remove powder residues, bullet shavings, carbon and other loose contaminants. Tip: If the weapon is extremely dirty it should be cleaned using hot water to prepare the cleaning bath.

Put the hammer in the cocked position. Lift the star shell ejector and place a spacer between the star and cylinder to enhance cleaning action. Position your weapon parts in the mesh basket in a way to avoid air entrapment. Lower the basket into the cleaning solution and set the timer for 7-10 minutes. Cleaning time depends on the condition of the weapon.

At the end of the cycle remove the handgun components from the bath. If they are not clean replace them in the bath until the cleaning is complete. Do not reach into an operating ultrasonic bath. Remove the basket from the bath if you want to inspect or rearrange the parts.

After cleaning rinse the parts in fresh water to remove all traces of the cleaning solution, shake them to remove excess water and allow them to drain. Compressed air will aid in this process.

Return the weapon parts to the basket.

Next place the lubricating pan into the ultrasonic cleaner again making certain that the bottom of the lubricating pan is in contact with the ultrasonic cleaning solution. Put the basket into the lubricating solution and set the timer for 10 minutes. Ultrasonic waves will pass from the ultrasonic cleaning bath to the lubricating bath and thoroughly lubricate the weapon parts.

After the lubricating step remove the parts and allow them to drain. Do not blow dry. Inspect then oil the parts according to the manufacturer’s instructions before reassembly.

Step 3: Reassembling the Remington 870 Express Shotgun

After using the ultrasonic cleaner, you can now reassemble all the parts of your Remington Shotgun. To reassemble your Remington shotgun, follow the same disassembly steps in reverse order.

Drop in the follower into the magazine, followed by the spring and its cap. Replace the trigger assembly into the receiver. Lock this in place by driving in the two receiver pins. Put the carrier unto the two action bars of the slide and replace the bolt as well. Carefully push the slide back unto the receiver. Remember to press unto the shelf stop on the left inside the lifting arm slot, as you push the slide back an inch or so. Slide the whole piece back in place. Pushing the slide partway, put the barrel back in.

You can now check the functioning condition of your shotgun. Check the safety and the slide stop.

Congratulations! You have just reassembled your “brand new” Remington 870 Express shotgun.

Additional Weapon Cleaning Tips

Oils that rise to the surface of the bath should be skimmed off and disposed of properly. When the ultrasonic handgun cleaner solution becomes discolored or cleaning takes longer it is time to replace it. Drain the tank and dispose of the spent solution according to local regulations. Take the time to remove sludge that settled to the bottom of the tank then clean the tank.

Questions: Visit or Contact the iUltrasonic ultrasonic cleaning experts at 973 821-3406

Disclaimer: This advice is not provided by a licensed gunsmith. Follow at your own risk. We assume no liability for any damages caused by following the advice in this article.


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