Let’s Talk About J&E Machine Tech A2 Buffer Tube Combo Kit
The J&E Machine Tech A2 Buffer Tube Combo Kit promises a reliable solution for retro AR builds or those seeking a fixed stock setup. Marketed as a Mil-Spec component, this kit aims to provide the essential parts needed for a functioning rifle length buffer system. As someone who has built numerous AR platforms over the years, I was interested to see if this kit lives up to the claims of quality and functionality, especially considering its attractive price point.
I was embarking on a retro AR-15 build, specifically an M16A2 clone. Finding a complete and affordable A2 buffer tube kit proved to be a slight challenge. I needed a reliable kit that wouldn’t break the bank and would function correctly right out of the box.
Upon receiving the J&E Machine Tech A2 Buffer Tube Combo Kit, my initial impression was fairly neutral. The parts appeared well-machined, and the finish was consistent. The weight felt appropriate for the materials, but I noticed the spring felt unusually stiff compared to other AR-15 buffer springs I’ve handled.
Compared to similar kits from Brownells or Aero Precision, the J&E Machine Tech kit is significantly more affordable. However, the Aero Precision kit offers a more refined finish and a reputation for stricter quality control. The Brownells kit, while slightly more expensive, provides detailed product descriptions and is often backed by user reviews. This lower price point made me cautious but hopeful.
My first impression was a mix of optimism and slight concern. The components appeared to be of decent quality, but the spring stiffness raised a red flag based on my prior experience. It seemed too firm for a standard AR-15 platform.
Real-World Testing: Putting J&E Machine Tech A2 Buffer Tube Combo Kit to the Test
First Use Experience
I initially tested the J&E Machine Tech A2 Buffer Tube Combo Kit on my retro AR-15 build at my local shooting range. The weather was clear, and the temperature was around 70 degrees Fahrenheit. I wanted to assess its performance with standard .223 Remington ammunition.
The rifle failed to cycle properly. The bolt consistently short-stroked, failing to pick up the next round from the magazine. This occurred even with various types of ammunition, indicating a clear issue with the buffer system.
The primary issue was the excessive spring tension, making it difficult for the rifle to cycle reliably. The rifle felt sluggish and unresponsive, despite having a properly gassed barrel. It was clear that something was not right with the spring.
Extended Use & Reliability
After several attempts to troubleshoot the issue, I replaced the provided buffer spring with a standard Mil-Spec AR-15 spring from another build. The rifle immediately began cycling reliably. This confirmed my suspicion about the spring being significantly over-sprung for the intended platform.
After swapping the spring, the tube itself has held up well over the past few months. There are no signs of unusual wear and tear on the buffer tube, which is a positive sign. Cleaning the buffer tube is straightforward, requiring only a quick wipe down with a lightly oiled cloth.
The performance with the replacement spring is adequate, but the experience highlighted the critical importance of a correctly matched buffer system. The initial failure to cycle underscored the potential for significant disappointment if the correct spring isn’t included. This kit has the potential to be a budget friendly kit if the spring issue is corrected.
Breaking Down the Features of J&E Machine Tech A2 Buffer Tube Combo Kit
Specifications
The J&E Machine Tech A2 Buffer Tube Combo Kit comprises four essential components for an AR-15 rifle length buffer system. These components are a buffer tube, buffer, buffer spring, and a spacer screw. The buffer tube is constructed from 6061-T6 aluminum, adhering to Mil-Spec dimensions for compatibility with A2 stocks.
The kit is designed for use with AR-15 platforms chambered in .223/5.56, though some users have reported issues with the provided spring. The specifications highlight the intent for use in retro builds or rifles requiring a fixed stock. The combination of aluminum construction and Mil-Spec dimensions aims to balance weight and durability.
These specifications are crucial for reliable cycling and recoil management. The correct spring rate and buffer weight are essential for proper function. Deviations from these specifications can lead to cycling issues, as I experienced firsthand.
Performance & Functionality
The buffer tube itself functions as expected, providing a stable platform for the A2 stock and facilitating smooth buffer travel. However, the overly stiff buffer spring severely hampered the kit’s overall performance. The spring’s excessive tension caused short-stroking and cycling failures.
The buffer tube itself meets expectations. The spring provided does not. Improvement is desperately needed in the spring.
The kit’s performance largely depends on replacing the incorrect spring. Only then will it function properly.
Design & Ergonomics
The J&E Machine Tech A2 Buffer Tube Combo Kit features a straightforward design, consistent with standard A2 buffer systems. The build quality of the buffer tube appears solid, with no visible flaws or machining marks. The kit offers a comfortable and functional setup when used with an A2 stock and the correct spring.
The buffer tube itself is user-friendly. The buffer spring is far from it. There is no learning curve to the actual buffer tube.
Durability & Maintenance
The 6061-T6 aluminum buffer tube is designed to withstand regular use and resist corrosion. After several months of use with a replacement spring, the buffer tube shows no signs of wear or damage. Maintenance is simple, requiring only periodic cleaning and light lubrication to ensure smooth operation.
The buffer tube should last a long time. The spring should be replaced immediately with a quality spring. It is very easy to maintain.
Accessories and Customization Options
The J&E Machine Tech A2 Buffer Tube Combo Kit is intended as a standalone kit, though it is compatible with various A2-style stocks and accessories. Users can customize their rifle with different buttplates, cheek risers, or sling mounts to enhance ergonomics and functionality. The Mil-Spec dimensions ensure compatibility with most aftermarket A2 stock options.
The kit is compatible with many accessories. The A2 stock is easily customizable to provide an enhanced user experience.
Pros and Cons of J&E Machine Tech A2 Buffer Tube Combo Kit
Pros
- Affordable price point, making it accessible for budget-conscious builders.
- Mil-Spec dimensions ensure compatibility with standard A2 stocks.
- Durable 6061-T6 aluminum buffer tube construction.
- Simple installation process for experienced AR builders.
- Adequate performance with a correctly matched replacement spring.
Cons
- Incorrectly spec’d buffer spring causing cycling issues and unreliability.
- Potentially misleading product description if the spring issue is not addressed.
- Lack of included sling end plate (though not explicitly advertised).
Who Should Buy J&E Machine Tech A2 Buffer Tube Combo Kit?
The J&E Machine Tech A2 Buffer Tube Combo Kit is perfect for experienced AR builders who are comfortable troubleshooting and sourcing replacement parts. It is also good for those specifically working on retro AR builds who need a budget-friendly option, provided they are prepared to replace the spring.
This product is not ideal for novice builders or those seeking a drop-in solution with guaranteed reliability out of the box. Those individuals should instead look at a more expensive, premium kit.
A must-have modification is replacing the buffer spring with a correctly spec’d AR-15 spring.
Conclusion on J&E Machine Tech A2 Buffer Tube Combo Kit
The J&E Machine Tech A2 Buffer Tube Combo Kit presents a mixed bag of value and potential frustration. While the buffer tube itself appears well-made and adheres to Mil-Spec dimensions, the inclusion of an incorrectly spec’d buffer spring significantly detracts from the overall experience. The kit’s low price point is appealing, but the need for a replacement spring diminishes the value proposition.
The price may be justified if the spring is replaced. I cannot personally recommend this kit in its current configuration due to the high probability of cycling issues.
With the spring issue resolved, this could be a solid budget option. However, as it stands, I would advise potential buyers to proceed with caution and factor in the cost of a replacement spring.