What Size Bore Brush for AR-15: A Comprehensive Guide

When it comes to maintaining your AR-15 rifle, one of the most crucial tools you’ll need is a bore brush. The right size bore brush can make a significant difference in the cleanliness and performance of your firearm. In this guide, we’ll delve into the various factors to consider when choosing the appropriate bore brush size for your AR-15.

Understanding Bore Brush Sizes

Bore brushes come in different sizes, typically ranging from .177 to .50 caliber. The size of the bore brush you need depends on the caliber of your firearm. For an AR-15, which is commonly chambered in .223 Remington, 5.56x45mm, or .308 Winchester, you’ll want to find a brush that matches these calibers closely.

For .223 Remington and 5.56x45mm, a bore brush with a diameter of .223 or .224 is ideal. For .308 Winchester, a brush with a diameter of .308 is the best choice. It’s important to note that bore brushes are not one-size-fits-all, and using the wrong size can be ineffective or even damage your firearm.

Types of Bore Brushes

There are several types of bore brushes available for cleaning your AR-15. Here’s a breakdown of the most common types:

• Steel Bore Brushes: These are the most common type of bore brush and are made of high-quality steel. They are durable and effective at removing fouling and debris from the bore.
• Brass Bore Brushes: Brass brushes are softer than steel and are often used for cleaning barrels that have been polished or treated with a special coating. They are less likely to scratch the barrel surface.
• Stainless Steel Bore Brushes: Similar to steel brushes, stainless steel brushes are durable and effective. They are often used for cleaning barrels that have been treated with stainless steel bore cleaner.
• Plastic Bore Brushes: Plastic brushes are the least expensive option and are suitable for cleaning barrels that have been treated with a plastic bore cleaner. They are not as durable as metal brushes and may not be as effective at removing fouling.

Choosing the Right Bore Brush for Your AR-15

When selecting a bore brush for your AR-15, consider the following factors:

• Caliber: As mentioned earlier, choose a bore brush that matches the caliber of your firearm. For .223 Remington and 5.56x45mm, a .223 or .224 brush is ideal. For .308 Winchester, a .308 brush is the best choice.
• Material: Consider the material of the brush based on your barrel’s condition and the type of cleaning solution you plan to use. For example, if your barrel has been polished or treated with a special coating, a brass brush may be a better option.
• Brush Length: The length of the bore brush should be long enough to reach the entire length of your barrel. Most AR-15 barrels are around 20 inches long, so a brush that is at least 20 inches in length is recommended.

Table: Bore Brush Sizes for Common AR-15 Calibers

By considering these factors, you can choose the right bore brush for your AR-15 and ensure that your firearm remains clean and in top condition.

Additional Tips for Cleaning Your AR-15

Here are some additional tips to help you maintain your AR-15:

• Use the Right Cleaning Solution: Choose a cleaning solution that is suitable for your firearm’s caliber and barrel material. Some popular options include Hoppes No. 9