The popularity of 9mm AR pistols and carbines continues to surge, driven by affordability, versatility, and the ability to utilize readily available ammunition. A key component in building or upgrading a 9mm AR platform is the stripped upper receiver. This guide will delve into the specifics of 9mm AR stripped uppers, covering their features, benefits, and considerations for selection.
Understanding the 9mm AR Stripped Upper
A 9mm AR stripped upper receiver is essentially the bare bones of the upper assembly, excluding the bolt carrier group (BCG), charging handle, and forward assist. It provides the foundation for building a custom 9mm AR, allowing for greater flexibility and personalization compared to purchasing a complete upper. Key features include:
- 9mm-Specific Design: Unlike standard .223/5.56 uppers, 9mm uppers incorporate features designed to accommodate the larger 9mm cartridge. This includes a modified ejection port and often a larger bolt carrier group.
- Material: Most 9mm AR stripped uppers are constructed from forged 7075-T6 aluminum, offering durability and strength. Some higher-end options may utilize different materials for enhanced performance or weight reduction.
- Compatibility: Ensure compatibility with your lower receiver. While most 9mm uppers are designed for standard AR-15 lowers, always verify compatibility before purchasing.
- Railing Systems: Many stripped uppers feature Picatinny rails for mounting optics, accessories, and other tactical gear. The length and configuration of these rails will vary depending on the manufacturer and model.
Benefits of Choosing a Stripped Upper
- Customization: The ability to select individual components allows for optimal customization based on budget and preferences. This includes choosing specific BCGs, charging handles, and other accessories.
- Cost-Effectiveness: In some cases, purchasing a stripped upper and assembling the rest of the components separately can prove more cost-effective than buying a complete upper.
- Component Selection: You can meticulously select higher-quality components for enhanced reliability and performance. This allows you to build an AR-9 tailored to your exact needs and specifications.
Key Considerations When Selecting a 9mm AR Stripped Upper
Several factors warrant careful consideration before purchasing a 9mm AR stripped upper:
- Brand Reputation: Choose reputable brands with proven track records of quality and reliability. Researching reviews and seeking recommendations from experienced AR builders can greatly assist in making an informed decision.
- Material and Construction: Opt for uppers constructed from high-quality materials such as forged 7075-T6 aluminum for optimal durability and longevity.
- Compatibility: Confirm compatibility with your lower receiver and other chosen components. Incompatibility can lead to malfunctions and safety hazards.
- Features and Specifications: Consider features such as the type and length of Picatinny rail, the presence of a forward assist, and any other features important to your build.
Choosing the Right BCG (Bolt Carrier Group)
The BCG is a critical component of the 9mm AR system. It is crucial to choose a BCG specifically designed for 9mm and compatible with your chosen upper receiver. The BCG should be constructed from high-quality materials and appropriately lubricated for optimal function. Incorrect BCG selection can lead to malfunctions or damage.
Conclusion
The 9mm AR stripped upper is a versatile and customizable component for building a reliable and personalized firearm. Careful consideration of the factors outlined above will help ensure a successful build, resulting in a high-quality and functional 9mm AR platform. Always prioritize safety and follow all applicable laws and regulations when building or modifying firearms. Remember to consult with experienced gunsmiths if needed during the assembly process.
