Building your own AR-15 is a rewarding experience, offering unparalleled customization and a deep understanding of your firearm. The Aero Precision M5 lower receiver is a popular choice for builders, known for its quality and affordability. This guide will walk you through the process of building an Aero Precision M5, covering everything from selecting components to final assembly and testing. We'll focus on best practices and provide tips for a successful and safe build.
Choosing Your Components: The Heart of Your M5 Build
The beauty of an AR-15 build lies in the ability to tailor it to your specific needs and preferences. While Aero Precision offers complete upper and lower receiver sets, building individually allows for greater control over the final product. Here's a breakdown of key components:
1. The Lower Receiver: The Foundation
You've already chosen your base: the Aero Precision M5 lower receiver. Its reputation for precision machining and reliable function makes it an excellent starting point. Ensure you purchase a stripped lower, as this allows for complete customization during the build.
2. Upper Receiver: Choosing Your Style and Features
The upper receiver houses the barrel, bolt carrier group, and charging handle. Aero Precision offers several M5 upper receivers, each with varying features. Consider the following:
- Material: Forged 7075-T6 aluminum is the standard and provides excellent durability.
- Finish: Anodizing protects against corrosion. Common finishes include black, but you might find other colors available.
- Forward Assist and Ejection Port Cover: These are generally included and are essential for operation.
3. Barrel: Accuracy and Caliber Considerations
The barrel is crucial for accuracy and performance. Factors to consider include:
- Caliber: .223 Wylde is a popular choice, offering compatibility with both .223 Remington and 5.56 NATO ammunition.
- Length: Barrel length significantly impacts ballistics, influencing velocity, accuracy, and overall handling characteristics. Shorter barrels are more maneuverable but may have increased recoil. Longer barrels generally offer greater accuracy and velocity.
- Profile: Different profiles (e.g., government profile, mid-length, lightweight) affect weight, balance, and heat dissipation.
4. Bolt Carrier Group (BCG): The Engine
The BCG is the heart of the firearm's cycling mechanism. Choose a high-quality BCG from a reputable manufacturer like Aero Precision or Toolcraft. Ensure it's compatible with your chosen caliber. Consider a nickel boron-coated BCG for reduced friction and smoother operation.
5. Charging Handle: Smooth and Reliable Operation
The charging handle allows you to manipulate the bolt carrier group. There are various styles and materials available. Choose one that feels comfortable and provides reliable operation.
6. Trigger: Customization for Performance
The trigger is a crucial component affecting accuracy and shooting experience. Many options exist, ranging from standard mil-spec triggers to enhanced aftermarket triggers providing improved feel and crisp breaks. Research different trigger types to find one that suits your needs and shooting style.
7. Handguard: Protection and Customization
The handguard protects your hands from the hot barrel and offers mounting points for accessories like optics and lights. Consider the length, material (aluminum or polymer), and M-LOK or KeyMod attachment systems.
Assembling Your Aero Precision M5: A Step-by-Step Guide
Once you’ve gathered all your components, it's time to assemble your AR-15. Numerous online resources, including videos from Aero Precision and other reputable sources, provide detailed visual instructions. Always prioritize safety and follow instructions meticulously. Improper assembly can lead to malfunction and potential injury.
Final Testing and Zeroing: Ensuring Accuracy and Reliability
After assembly, thoroughly inspect your rifle for proper function and safety. Always follow all gun safety rules. Take it to a range and test fire it, ensuring proper function and accuracy. Zero your optic (if applicable) to ensure consistent shot placement.
This guide provides a foundational understanding of building an Aero Precision M5 AR-15. Remember, responsible gun ownership includes thorough research, safe handling, and adherence to all applicable laws and regulations. Always consult reputable resources and seek professional guidance if needed.
