upper receiver maintenance

Upper Receiver Maintenance: How to Keep Your AR-15 Running Smoothly

The AR-15 is a reliable and versatile firearm that requires proper maintenance to ensure optimal performance. One of the most critical components of an AR-15 is the upper receiver, which houses the barrel, gas system, and bolt carrier group. It’s important to note that there are many different manufacturers of AR-15 uppers, so it’s essential to choose one that is made with high-quality materials, such as those made with 100% certified material in the USA. In this article, we’ll take a closer look at AR15 upper receiver maintenance and provide tips on how to keep your AR-15 running smoothly.

Why Upper Receiver Maintenance is Important

The upper receiver is one of the most critical components of an AR-15, and proper maintenance is essential to ensure optimal performance. Neglecting upper receiver maintenance can lead to a host of problems, including decreased accuracy, cycling issues, and even catastrophic failure. To avoid these problems, it’s important to perform regular maintenance on your AR15 upper receiver.

upper receiver maintenance

Cleaning the Upper Receiver

Cleaning the upper receiver is one of the most crucial parts of upper receiver maintenance. Before cleaning your AR-15 upper receiver, ensure that the firearm is unloaded and that the magazine is removed. Once you have confirmed that the firearm is unloaded, disassemble the upper receiver from the lower receiver.

Using a bore brush and solvent, thoroughly clean the inside of the barrel. Ensure that you clean the gas tube and the gas block thoroughly to remove any fouling. Next, use a cleaning rod and patch to clean the bore of the barrel. It’s essential to use a cleaning solution designed explicitly for firearms to avoid damaging the barrel.

After cleaning the barrel, clean the inside of the upper receiver. Use a nylon brush and solvent to clean the bolt carrier group, including the bolt and bolt carrier. Once you have thoroughly cleaned the upper receiver, use a dry cloth to remove any excess solvent and allow the upper receiver to air dry.

Lubricating the Upper Receiver

Lubricating the upper receiver is another critical component of upper receiver maintenance. Proper lubrication ensures that the moving parts of the AR-15 operate smoothly and prevents premature wear and tear.

When lubricating the upper receiver, it’s essential to use a lubricant specifically designed for firearms. Apply a small amount of lubricant to the moving parts of the upper receiver, including the bolt carrier group, the charging handle, and the ejection port. Be sure to wipe away any excess lubricant, as too much lubricant can attract dirt and debris, which can lead to malfunctions.

Inspecting the Upper Receiver

Regular inspections of the upper receiver can help you identify potential issues before they become major problems. During the inspection, check the gas block and gas tube for any signs of wear or damage. Inspect the barrel for signs of erosion or damage, such as pitting or rust.

Check the bolt carrier group for any signs of wear, such as scratches or dents, and ensure that the gas rings are properly installed and intact. Inspect the charging handle for any signs of damage or wear, and ensure that it operates smoothly.

Replacing Parts as Needed

If you notice any signs of wear or damage during your inspection, it’s essential to replace the affected parts promptly. Failure to replace worn or damaged parts can lead to malfunctions and even catastrophic failure.

When replacing parts, it’s important to use quality parts from a reputable manufacturer. Using subpar or poorly manufactured parts can lead to problems and decrease the reliability and safety of your firearm.


Maintaining your AR-15 upper receiver with high-quality materials is critical to ensure its optimal performance and safety. Regular cleaning, lubrication, and inspections can help identify potential issues before they become major problems. If you’re unsure about how to maintain your AR15 upper receiver properly, consult with a firearms expert or attend a firearms maintenance course to gain the necessary knowledge and skills. With proper maintenance using 100% certified material, your AR-15 will provide you with reliable and accurate performance for years to come.

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