Building your own AR-15 can be a rewarding experience, offering customization and a deeper understanding of your firearm. This guide focuses on building an AR-15 using parts from Palmetto State Armory (PSA), a popular choice for budget-conscious builders. We'll cover the process step-by-step, highlighting important considerations and best practices. Remember always to follow all local, state, and federal laws regarding firearm ownership and assembly.
Choosing Your PSA AR-15 Lower Receiver
The lower receiver is the serialized part of your AR-15 and must be purchased separately. PSA offers a wide variety of lowers, from basic models to those with enhanced features. Consider these factors when selecting your lower:
- Material: Most PSA lowers are made from 7075-T6 aluminum, a durable and reliable material.
- Finish: Anodized finishes offer corrosion resistance. Consider the color and style that best suits your preferences.
- Features: Some lowers include features like ambidextrous safety selectors or enhanced ergonomics.
Important Note: Before purchasing your lower, verify that it's legal in your jurisdiction. Regulations vary significantly by location.
Assembling the Lower Receiver: A Step-by-Step Guide
This section details the process of assembling the lower receiver. Each step is crucial for a functional and safe firearm. Always refer to PSA's specific instructions and safety guidelines.
- Install the Buffer Tube: Carefully align the buffer tube with the receiver extension and secure it with the provided castle nut and end plate. Proper torque is crucial; an improperly installed buffer tube can lead to malfunctions.
- Insert the Buffer and Spring: Insert the buffer spring into the buffer tube, followed by the buffer itself.
- Install the Trigger Group: This step requires careful attention to detail. Ensure the trigger pins are correctly aligned before tapping them into place. A correctly installed trigger group ensures proper trigger function and safety.
- Install the Safety Selector: Align the safety selector lever and push it into place.
- Install the Grip: Simply attach the pistol grip to the receiver.
- Install the Magazine Catch: This small component holds the magazine securely in place. Ensure it is installed correctly to prevent magazine drop issues.
Selecting Your Upper Receiver and Components
The upper receiver houses the barrel, bolt carrier group, and charging handle. PSA offers various upper receivers, each with its own features.
- Complete Upper Receivers: PSA sells complete upper receivers, including the barrel, handguard, bolt carrier group, charging handle, and other components. This is the easiest option for beginners.
- Individual Components: You can also purchase each component individually, allowing greater customization but requiring more technical knowledge.
Key Considerations:
- Barrel Length: Common lengths include 16", 18", and 20". Barrel length affects accuracy, velocity, and overall weight.
- Handguard: The handguard protects the barrel and provides a place to attach accessories. Consider the length and material (aluminum, polymer) based on your needs.
- Bolt Carrier Group (BCG): The BCG is a crucial component. PSA offers various BCGs, including their popular Nitride-treated BCGs.
- Charging Handle: Ensure the charging handle is compatible with your upper receiver.
Table: Common PSA AR-15 Upper Receiver Components
| Component | Description | Considerations |
|---|---|---|
| Barrel | The core component where the bullet is fired. | Length, twist rate, profile are important factors. |
| Handguard | Protects the barrel and supports accessories. | Material, length, and rail system are key. |
| Bolt Carrier Group (BCG) | Cycles the ammunition. | Choose a reputable and reliable BCG. |
| Charging Handle | Used to manually cycle the BCG. | Choose a comfortable and functional charging handle. |
Assembling the Upper Receiver
Assembling the upper receiver requires patience and attention to detail. Again, always refer to PSA's instructions and safety guidelines.
- Install the Barrel Nut: This step often requires specialized tools like a barrel nut wrench. Properly torqued barrel nut ensures the barrel is securely attached.
- Attach the Handguard: Securely attach the handguard to the barrel nut and upper receiver.
- Install the Bolt Carrier Group: Insert the bolt carrier group into the upper receiver.
- Install the Charging Handle: Attach the charging handle to the BCG.
Final Steps and Functionality Checks
Once the upper and lower receivers are assembled, ensure proper function and safety:
- Test the Trigger: Ensure the trigger pull is smooth and consistent, and the safety selector functions correctly.
- Dry Fire: Dry firing (without ammunition) allows you to practice your trigger control and check for any binding or malfunctions. Always treat every firearm as if it were loaded.
- Initial Function Check (With Ammunition): Once you have practiced, you can use live ammunition to check for malfunctions.
Conclusion: Enjoy Your Custom PSA AR-15 Build
Building your own PSA AR-15 is a rewarding process that allows for extensive customization. By following these steps and adhering to safety guidelines, you can confidently assemble your own rifle. Remember to always handle firearms responsibly and safely. Always consult with a qualified professional if you have any questions or concerns.
Disclaimer: This guide provides general information. Always refer to PSA's specific instructions and safety guidelines for your chosen parts. Firearm assembly and use involve inherent risks. Handle firearms responsibly and safely. This information should not be considered legal or professional advice.