Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit Review

Does the Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit Live Up to Its Name?

The world of firearms, particularly the AR-15 platform, is one of constant modification and personalization. For those seeking to alter the ergonomics and functionality of their rifle, particularly by transitioning to a more traditional A2-style stock, the Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit emerges as a seemingly straightforward solution. This kit promises to bridge the gap between modern M4-style receivers and the robust A2 buttstock, including all necessary components for a seamless installation. My own journey to this particular kit began with a desire to move away from the adjustable, often wobbly, collapsible stocks that come standard on many builds. I found myself craving the solid, fixed feel and increased storage potential that an A2 stock offers, but the M4 buffer tube system presented an immediate hurdle. Initial impressions of the kit upon arrival were positive; the components felt solid, with a good weight and a consistent matte black finish that suggested decent quality. While I briefly considered generic parts or attempting to piece together individual components, the convenience and apparent completeness of this bundled solution made it the clear choice. My first reaction was one of quiet satisfaction, a feeling that the essential mechanical puzzle piece I needed had finally arrived.

Real-World Testing: Putting Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit to the Test

First Use Experience

My primary testing environment for this kit was my home workshop, specifically on my AR-15 lower receiver. The installation was straightforward, a process that took less than fifteen minutes from opening the box to having the buffer tube, spring, and buffer securely in place, ready for the A2 stock itself. Conditions were standard workshop temperatures, with good lighting, and no extreme elements to contend with. The ease of use was remarkable; the kit is designed for direct application on any standard AR-15 or M16 lower. There was no need for specialized tools beyond a basic armorer’s wrench or vise, and even those were not strictly necessary for the installation of the kit components themselves. The only minor surprise was the inclusion of a small spacer or cap, which I learned was essential for proper seating of the A2 stock, a detail that might be overlooked if one were sourcing parts individually.

Extended Use & Reliability

After several hundred rounds through the rifle with the installed A2 stock and this kit’s buffer system, the performance remains as solid as the initial installation. The buffer spring has shown no signs of weakening, and the buffer itself operates smoothly within the tube without any excessive rattle or vibration. Durability appears to be excellent; there are no visible signs of wear on the buffer tube’s exterior or interior, nor on the buffer itself. The matte finish has held up remarkably well, showing no chips or scratches despite the occasional bump against my workbench. Maintenance is practically non-existent beyond the standard cleaning of the firearm; the buffer tube and its components are largely internal and protected. In comparison to other buffer systems I’ve worked with, including those from more established brands, this Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit performs on par, offering a quality feel and reliable function that easily matches more expensive alternatives.

Breaking Down the Features of Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit

Specifications

The Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit is a comprehensive package designed to facilitate the installation of an A2 style buttstock onto any AR-15 or M16 lower receiver. It contains all the essential components: a steel buffer, a steel buffer tube, a buffer spring, and a stock extension cap. The kit is finished in a matte black and is constructed from steel, ensuring durability and a professional aesthetic. This standard-sized kit is engineered to fit any AR-15 platform, making it a versatile option for various builds. The buffer is crucial for absorbing recoil, a key difference between M4-style buffer tubes and the longer A2 system, ensuring smoother operation. The buffer tube itself provides the housing for these components and threads into the receiver, with its specific length and diameter being integral to accommodating the A2 stock. The spring provides the necessary tension for the bolt carrier group’s return, while the stock extension cap ensures proper engagement with the A2 stock.

Performance & Functionality

The primary function of this installation kit is to provide a robust and reliable buffer system for an A2 stock. In this regard, it performs exceptionally well. The buffer effectively dampens recoil, making follow-up shots more manageable. The buffer spring provides consistent tension, contributing to reliable cycling of the action, even during rapid firing sequences. I experienced no malfunctions or failures related to this kit during my testing period. Its functionality is straightforward: install the components correctly, and they simply work. Compared to the often looser feel of some adjustable M4 stock systems, the solid lock-up achieved with an A2 stock, facilitated by this kit, feels significantly more robust and purpose-built. The kit meets and arguably exceeds expectations for its intended purpose, offering a critical component for a specific rifle configuration.

Design & Ergonomics

The design of the Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit is utilitarian and functional, which is precisely what one expects and desires for internal rifle components. The steel construction lends a reassuring heft and perceived durability. The matte black finish is consistent across all parts and provides a non-reflective surface that blends well with most rifle finishes. While the parts themselves are not ergonomically interacted with during use, their precise manufacturing and smooth finish ensure they don’t snag or bind within the buffer tube. The threading on the buffer tube is clean and engages the receiver securely without cross-threading. There is no learning curve associated with these parts; their design is dictated by established AR-15 platform standards, ensuring compatibility and ease of installation.

Durability & Maintenance

Given the materials and the nature of the components, the durability of the Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit appears to be excellent. The steel buffer, steel buffer tube, and buffer spring are all built to withstand the rigors of repeated firing cycles. I anticipate this kit will last for tens of thousands of rounds, if not more, under normal use conditions. Maintenance is minimal, typically limited to ensuring the components are clean during a general rifle teardown. A quick wipe down with a solvent-dampened cloth and a light re-oiling of the buffer tube’s interior before reassembly is usually sufficient. I haven’t encountered any obvious failure points; the design is inherently simple and robust. The primary concern for longevity would be damage to the threading on the buffer tube, which is preventable with careful installation.

Accessories and Customization Options

The Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit is sold as a self-contained unit, meaning it comes with all the necessary parts for its specific function. Therefore, there are no additional accessories included in the traditional sense. However, the kit is designed to be the foundation for installing an A2 buttstock, so the “customization” aspect comes in the choice of that stock itself. The kit is fully compatible with any standard A2 buttstock designed for AR-15 or M16 platforms. Furthermore, the buffer tube is a standard AR-15 size, ensuring it will thread correctly into any mil-spec or commercial-spec AR-15 lower receiver. The buffer and spring are also designed to work within the parameters of the A2 system. While not an accessory, the inclusion of the stock extension cap is a crucial part of the “kit” that ensures proper fitment.

Pros and Cons of Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit

Who Should Buy Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit?

This kit is an excellent choice for AR-15 and M16 owners who specifically intend to install an A2 style fixed buttstock on their rifle. It is ideal for builders, tinkerers, or anyone seeking to replicate the classic A2 configuration or achieve the solid feel and potential storage benefits that come with it. Individuals who prefer the traditional ergonomics over adjustable stocks will find this kit indispensable.

You should likely skip this kit if you are solely planning to use an adjustable M4-style collapsible stock, as the buffer tube length and component specifications are entirely different. For those looking for a sterile, medical-grade environment, this product is entirely unrelated. Similarly, if your focus is on ultra-compact gear or specialized precision instruments outside of firearms, this is not the product for you.

For those proceeding with the A2 stock conversion, I would highly recommend pairing this kit with a quality A2 buttstock itself, a suitable castle nut and end plate (though often integrated with the A2 stock assembly or purchased separately), and a basic AR-15 armorer’s tool for safe and efficient installation of the castle nut. A torque wrench is also advisable for proper castle nut tension.

Conclusion on Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit

The Tacmod US Tactical Systems Back-Up 20 and A2 Buttstock Installation Kit delivers exactly what it promises: a complete, high-quality solution for anyone looking to transition their AR-15 platform to an A2 fixed stock system. The steel construction and matte black finish speak to its durability and professional appearance, while the straightforward installation and reliable performance make it a pleasure to use. For a price of $53.89, the value proposition is clear; you receive all the critical internal components for this specific stock configuration without needing to hunt down individual, potentially incompatible parts. I would absolutely recommend this kit to anyone undertaking an A2 stock build. It’s a no-brainer purchase that provides the foundational elements for a solid, classic rifle setup, ensuring your project moves forward smoothly and reliably.