How to Remove an AR Stock: A Comprehensive Guide for the Modern Marksman

Removing an AR-15 stock is generally a simple process, but it requires understanding the type of stock you have and following the correct steps. The majority of AR-15s come with either a collapsible (adjustable) stock or a fixed stock. For a collapsible stock, locate the adjustment lever or button (usually on the underside of the stock). Depress the lever or button and simultaneously slide the stock rearward off the buffer tube. For a fixed stock, you’ll likely need to loosen or remove the buffer tube nut (castle nut) and any screws securing the stock to the receiver.

Understanding AR-15 Stock Types

Before you dive into the removal process, let’s briefly cover the two main types of AR-15 stocks:

Collapsible Stocks

Also known as adjustable stocks, these are by far the most common. They allow the user to adjust the length of pull for a more comfortable and customized fit. These stocks slide along a buffer tube and are locked into different positions via a spring-loaded pin and adjustment lever.

Fixed Stocks

Fixed stocks offer a more solid and stable platform, preferred by some shooters for accuracy and recoil management. These stocks are directly attached to the lower receiver, often using the buffer tube as a supporting structure. They don’t offer length-of-pull adjustments.

Removing a Collapsible (Adjustable) Stock: Step-by-Step

Removing a collapsible stock is relatively straightforward. Here’s a detailed breakdown:

1. Ensure the Firearm is Unloaded and Safe: This is the most important step. Remove the magazine, clear the chamber, and visually inspect to ensure the rifle is completely unloaded.
2. Locate the Adjustment Lever/Button: This is typically located on the underside of the stock, near the receiver. Some models may have a button instead of a lever.
3. Depress the Lever/Button: Firmly press down on the lever or button. This disengages the locking pin that secures the stock to the buffer tube.
4. Slide the Stock Rearward: While holding the lever/button down, slide the stock straight back off the buffer tube. You may need to apply a bit of force, especially if the stock is new or hasn’t been adjusted frequently.
5. Complete the Removal: Once the stock clears the buffer tube, you can fully remove it from the rifle.

Removing a Fixed Stock: A More Involved Process

Removing a fixed stock requires a bit more effort and may necessitate specific tools.

1. Ensure the Firearm is Unloaded and Safe: Again, confirm the rifle is unloaded.
2. Secure the Lower Receiver: Clamp the lower receiver in a vise, using appropriate vise blocks to prevent damage.
3. Loosen the Castle Nut: The castle nut (also known as the buffer tube nut) secures the buffer tube to the receiver. Use an AR-15 armorer’s wrench to loosen the castle nut. You may need to apply significant force.
4. Remove the Buffer Tube Retainer: Carefully depress the buffer retainer (a small pin located at the rear of the lower receiver) and slowly unscrew the buffer tube. The buffer retainer is under spring tension, so be cautious.
5. Remove the Buffer Spring and Buffer: Once the buffer tube is removed, the buffer spring and buffer will come out. Keep these parts organized.
6. Remove the Fixed Stock: Depending on the specific model, the fixed stock may be held in place by screws or other fasteners. Remove these fasteners. The stock should now be free to slide off the receiver.

Important Considerations and Safety Precautions

• Always prioritize safety. Double-check that the firearm is unloaded before commencing any work.
• Use the correct tools. Using the wrong tools can damage the firearm and potentially cause injury.
• Consult the manufacturer’s instructions. If you are unsure about any step, refer to the owner’s manual or seek guidance from a qualified gunsmith.
• Be aware of local laws. Some jurisdictions may have restrictions on certain types of stocks or modifications to firearms.
• Don’t force anything. If something feels stuck, stop and reassess the situation. Forcing components can lead to damage.

Frequently Asked Questions (FAQs)

1. What tools do I need to remove an AR-15 stock?

   For a collapsible stock, you typically don’t need any tools. For a fixed stock, you’ll likely need an AR-15 armorer’s wrench to loosen the castle nut, vise blocks, and potentially screwdrivers depending on the model.

2. Can I replace my fixed stock with a collapsible stock?

   Yes, you can. However, you’ll need to replace the buffer tube with a mil-spec or commercial-spec buffer tube designed for collapsible stocks. Ensure you select the correct buffer tube specification to match your chosen stock.

3. What is the difference between a mil-spec and a commercial-spec buffer tube?

   Mil-spec buffer tubes have a slightly smaller diameter than commercial-spec tubes. Mil-spec tubes are generally considered more durable and are the standard for military rifles. Make sure your stock and buffer tube specifications match.

4. How do I know which buffer tube specification I have?

   The easiest way is to measure the outside diameter of the buffer tube. A mil-spec tube will be approximately 1.148 inches in diameter, while a commercial-spec tube will be around 1.170 inches.

5. What is the purpose of the buffer spring and buffer?

   The buffer spring and buffer work together to absorb recoil energy and ensure proper cycling of the action. They prevent the bolt from slamming into the rear of the receiver, which can cause damage.

6. What happens if I don’t properly tighten the castle nut?

   If the castle nut is not properly tightened, the buffer tube can loosen, leading to malfunctions and potential damage to the firearm. Make sure to tighten the castle nut securely.

7. Is it legal to change the stock on my AR-15?

   It depends on your local laws. Some jurisdictions may restrict the types of stocks allowed or the overall length of the firearm. Always check your local and federal regulations before making any modifications.

8. What is a “pistol brace,” and how does it differ from a stock?

   A pistol brace is designed to be strapped to the forearm for stability when firing a pistol. Stocks are designed to be shouldered. The legal classification of these devices has been subject to change, so stay informed about current regulations from the ATF.

9. Can I install a folding stock on my AR-15?

   Yes, you can install a folding stock, but ensure that it complies with all applicable laws and regulations. Some folding stock adapters may require modifications to the firearm.

10. How do I choose the right replacement stock for my AR-15?

    Consider your shooting style, desired length of pull, and preferred features. Research different brands and models, and read reviews to find a stock that meets your needs.

11. What is the importance of using vise blocks when working on my AR-15?

    Vise blocks provide a secure and stable platform for working on your AR-15 while preventing damage to the receiver. They distribute pressure evenly and protect the finish.

12. Where can I find reliable information about AR-15 modifications and maintenance?

    Consult reputable gunsmiths, firearms instructors, and manufacturers’ resources. Online forums and communities dedicated to AR-15s can also be valuable sources of information, but always verify the accuracy of the information before acting on it.

By following these steps and heeding the safety precautions, you can safely and effectively remove and replace the stock on your AR-15. Remember to prioritize safety, use the correct tools, and consult the manufacturer’s instructions when necessary.