What is an A2 Upper Parts Kit?
The world of AR-15 customization is vast and exhilarating. From sleek, modern builds to classic, battle-proven configurations, the possibilities are seemingly endless. If you find yourself drawn to the heritage and reliability of a time-tested design, or perhaps simply want to breathe new life into your existing rifle, understanding the “A2 Upper Parts Kit” is paramount. This kit is more than just a collection of components; it’s a gateway to building or refurbishing an iconic AR-15 upper receiver. Let’s delve into the specifics, uncovering the essential parts, benefits, and considerations for integrating an A2 Upper Parts Kit into your next AR-15 project.
The AR-15, often called “America’s Rifle,” enjoys unparalleled popularity among civilian shooters and enthusiasts. Its modular design and adaptability have made it a favorite for target shooting, hunting, home defense, and competitive shooting. Central to this versatility is the upper receiver, the structural heart of the firearm that houses the bolt carrier group, barrel, and other critical elements. Upgrading or building an upper receiver is a common entry point for those looking to customize their AR-15. This is where the “A2 Upper Parts Kit” comes into its own, offering a pathway to a classic look and feel.
Before diving deeper, let’s define exactly what an A2 Upper Parts Kit entails. The “A2” designation refers to a specific generation of the AR-15, characterized by its fixed carry handle and integrated rear sight. This distinctive design offers a robust and reliable sighting system. The A2 upper is instantly recognizable, exuding an aura of ruggedness and historical significance.
An A2 Upper Parts Kit isn’t typically a complete upper receiver. Instead, it comprises the essential components needed to assemble an A2 upper receiver shell (which is purchased separately). These are the pieces that often get lost, damaged, or simply wear out over time, or that you’ll need to build a brand-new upper.
Typically, an A2 Upper Parts Kit contains these vital elements:
Forward Assist Assembly: This component allows the shooter to manually push the bolt carrier group forward, ensuring complete chambering of a round, especially in challenging conditions.
Ejection Port Door/Cover: This hinged door protects the internal components of the upper receiver from debris and environmental contaminants.
Ejection Port Door Spring: This small but crucial spring provides the tension needed to keep the ejection port door closed until the bolt carrier group cycles.
Ejection Port Door Rod: This slender rod acts as a pivot point for the ejection port door and holds the spring in place.
Brass Deflector: Many A2 upper receivers include a brass deflector to direct ejected casings away from the shooter’s face. While some uppers have these permanently integrated, a parts kit might include a separate one.
A2 Rear Sight Assembly: This is the most defining feature, featuring a fully adjustable peep sight and a robust, fixed carry handle. (Note: Sometimes, this is purchased separately depending on the kit).
Other Small Parts: These often include the necessary roll pins, detents, springs, and screws needed to properly install the larger components. The exact contents will vary depending on the manufacturer and the kit’s focus.
These parts work in unison to ensure proper functionality and protection of the internal mechanisms of the upper receiver. The kit provides all the small but essential pieces you need to build up a barebones upper.
Advantages of the A2 Upper Parts Kit
There are numerous reasons why shooters continue to embrace the A2 design and the corresponding parts kit.
One of the most significant advantages is the **classic look and feel**. The integrated carry handle and fixed sights evoke the history and legacy of the AR-15 platform. For those who appreciate a traditional aesthetic, the A2 upper is an excellent choice. It connects the shooter to the roots of the rifle, a design that has proven itself across decades of service.
Another key benefit is **simplicity and durability**. The A2 design is intentionally straightforward, with fewer moving parts than more modern upper receivers. This simplicity translates to increased reliability. There are fewer things that can go wrong, making it a robust choice for various shooting applications. The fixed sights also tend to be extremely rugged, not prone to losing zero easily.
The “A2 Upper Parts Kit” can often be quite **cost-effective**. Building an A2 upper is often less expensive than purchasing a complete upper with all the modern enhancements. If you’re on a budget, this is an attractive option, particularly for those new to the AR-15 world or building on a budget. Furthermore, because the parts are typically widely available, you can often repair or replace components inexpensively.
The installation process of an A2 upper parts kit is generally **easy to install**. It doesn’t require specialized tools or complex mechanical expertise. A well-organized workspace and basic knowledge of AR-15 mechanics are typically enough to complete the installation. Detailed online guides and videos are readily available, allowing even novices to complete the process confidently.
Finally, let’s not forget the **historical significance** of the A2 design. It represents an era of the AR-15’s development. Many shooters and collectors appreciate the heritage and legacy of this iconic configuration. Owning an A2 upper allows you to connect with this history.
Key Considerations When Choosing an A2 Upper Parts Kit
Choosing the right “A2 Upper Parts Kit” involves careful consideration to ensure a successful build. Here are some key factors to keep in mind:
Compatibility is paramount. Make certain that all the elements included in the kit work harmoniously. This is critical to the smooth operation of your AR-15. The most crucial aspect of compatibility involves matching the upper receiver to your lower receiver. Thankfully, the AR-15 platform is largely standardized, so most lowers will accept an A2 upper. However, always double-check the specifications and ensure the pins are compatible. Also, ensure your barrel, gas system, and handguard are designed to match your A2 upper receiver.
Material and Quality of components should be at the forefront of your decision-making. The materials used in the kit will influence durability and longevity. Look for kits that use high-quality steel for critical components, such as the forward assist assembly and the ejection port door. Aluminum is typically used for the receiver, and it’s important the receiver is of good quality. The finish applied to each component is also crucial. Quality finishes help protect the parts from corrosion and wear. Opting for kits from reputable manufacturers helps guarantee quality and reliability.
Brand Reputation plays a significant role. Do your research and read reviews from other shooters before committing to a specific brand. Well-established brands often have a proven track record of producing reliable and high-quality components. Look for brands that consistently receive positive feedback regarding their products. This research will save you headaches later on.
Specific Needs and Preferences must be considered. Decide on the intended purpose of your AR-15 build. If you intend to use the rifle for target shooting, you may want to choose a kit with a particularly robust rear sight. If you plan to use your AR-15 for hunting, consider the weight and overall balance of the upper receiver build. Do you intend to upgrade the internal components of the lower receiver? These are all factors you need to weigh prior to purchasing your A2 Upper Parts Kit.
Installation: Bringing Your A2 Upper Together
Installing an “A2 Upper Parts Kit” is within the reach of most firearm enthusiasts. However, safety should be your top priority. Always handle firearms responsibly and follow all safety precautions. It’s also vital to ensure you are abiding by all federal, state, and local laws when building or upgrading a firearm.
You’ll need a few essential tools for installation:
A bench vise with soft jaws
A roll pin punch set
A hammer (a small gunsmithing hammer is ideal)
A set of punches
A vise block to secure your upper receiver
A cleaning rod and brush
Here’s a brief outline of the installation process:
Preparation: Secure your upper receiver in a vise block. Carefully inspect all components in the kit.
Forward Assist Installation: Insert the forward assist assembly and its spring, then drive the roll pin into place. Ensure the forward assist moves freely.
Ejection Port Door Installation: Insert the door spring into the receiver, then install the ejection port door. Insert the pivot rod and secure it in place. The door should open and close smoothly.
Brass Deflector (if separate) installation: Attach the brass deflector. If your kit has one, ensure it is properly aligned and secured.
Rear Sight Installation (if required): If your kit includes a rear sight assembly, install this per the manufacturer’s instructions.
Final Inspection: Thoroughly inspect all components for proper function and alignment. Ensure everything moves freely and securely. Clean the upper receiver of any debris.
It’s highly recommended that you follow the manufacturer’s specific instructions provided with the kit. Several excellent online resources, including videos and detailed tutorials, can guide you through each step.
Troubleshooting is sometimes necessary. Common issues include difficulty installing roll pins, or the forward assist or ejection port door sticking. Use a punch of the correct size to properly install roll pins. Ensure all components are correctly aligned. If you’re having issues, refer to your manufacturer’s instructions or search online forums.
Finding Your A2 Upper Parts Kit
Finding a high-quality “A2 Upper Parts Kit” is relatively straightforward. Here are some of the best places to start your search:
Online Retailers are a great resource. Many online retailers specialize in AR-15 parts. Look for reputable online stores. These retailers frequently offer a wide selection of A2 Upper Parts Kits from various manufacturers, often with competitive pricing and detailed product descriptions.
Gun Shops (both local and national) are an excellent source. Local gun shops can offer a more personalized shopping experience and sometimes have staff who are well-versed in AR-15 builds and can provide advice. Larger national gun stores typically offer a wide array of options.
Brand-Specific Products: Some manufacturers specialize in producing A2 upper parts. Checking out their websites directly can give you the widest selection of their products. This also helps you get your hands on specialized components.
When comparing kits, pay close attention to prices and features. Read customer reviews before making a purchase. Reviews provide valuable insights into the quality, reliability, and ease of installation of each kit. Look for kits with high ratings and positive feedback from other shooters.
Conclusion: Embracing the Classic
The “A2 Upper Parts Kit” provides an excellent foundation for building or restoring a classic AR-15 upper receiver. With the right components and a little care, you can assemble a reliable and historically significant upper that will serve you well for years to come. By understanding the components, advantages, and considerations, you’ll be well-equipped to begin your project. The A2 upper represents a timeless design with proven reliability and a unique aesthetic. Embrace the heritage and get started building your own classic AR-15 today.
