The .400 Legend cartridge is quickly gaining popularity among shooters, and with that rise in popularity comes a growing demand for complete upper receivers. If you're looking to build or upgrade your AR-15 platform, understanding the nuances of a 400 Legend complete upper is crucial. This guide will delve into the key features, benefits, and considerations to help you make an informed purchase.
What is a 400 Legend Complete Upper?
A 400 Legend complete upper receiver is a pre-assembled unit that includes everything above the lower receiver of your AR-15 platform. This typically includes the upper receiver itself, bolt carrier group (BCG), barrel, handguard, gas tube, and charging handle. Purchasing a complete upper offers several advantages, streamlining the build process and often providing a cost-effective solution compared to purchasing individual components.
Key Features to Consider When Buying a 400 Legend Complete Upper
Several crucial features differentiate various 400 Legend complete uppers on the market. Understanding these features will allow you to choose the best option for your specific needs and budget.
1. Barrel Length and Profile:
Barrel length significantly impacts the ballistics of the .400 Legend cartridge. Shorter barrels (e.g., 10.5" or 16") offer increased maneuverability and reduced weight, while longer barrels (e.g., 18" or 20") generally provide increased accuracy and velocity. The barrel profile (e.g., lightweight, mid-weight, heavy) affects balance, weight, and heat dissipation. Consider your intended use – home defense, hunting, or target shooting – when making your decision.
2. Handguard Material and Length:
The handguard protects your hands from heat and provides mounting points for accessories like optics and lights. Common materials include aluminum and polymer, each offering different benefits in terms of durability, weight, and heat resistance. Handguard length influences balance and the potential for mounting accessories. Choose a length appropriate to your desired setup.
3. Bolt Carrier Group (BCG):
The BCG is a critical component responsible for cycling the action. Look for a BCG constructed from high-quality materials, such as Carpenter 158 steel, known for its strength and durability. Consider whether you prefer a standard or nickel boron BCG; the latter is known for its smoother operation and reduced friction.
4. Gas System:
The gas system's design influences how the firearm cycles. Direct impingement systems are common, but other systems offer potential advantages. Understanding the nuances of different gas systems can impact reliability and overall performance.
5. Manufacturer Reputation:
Choosing a reputable manufacturer is crucial for ensuring quality and reliability. Research different brands, read reviews, and look for manufacturers with a strong track record of producing high-quality AR-15 components.
Benefits of Choosing a Complete Upper
The advantages of buying a 400 Legend complete upper are substantial:
- Convenience: A complete upper simplifies the build process, eliminating the need to source and assemble individual components.
- Cost-effectiveness: Often, purchasing a complete upper is more economical than buying individual parts.
- Guaranteed compatibility: Complete uppers ensure all components are compatible, reducing the risk of issues during assembly.
- Faster build time: Building with a complete upper significantly reduces the overall build time.
Conclusion
Selecting the right 400 Legend complete upper requires careful consideration of several factors. By understanding the key features, benefits, and considerations outlined in this guide, you'll be well-equipped to make an informed purchase that meets your specific needs and enhances your shooting experience. Remember to always prioritize safety and handle firearms responsibly.
