Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly Review

The Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly: Final Thoughts from Me

There are certain rifle components that, at first glance, seem purely functional, designed for utility above all else. Then there are those that push the boundaries, aiming for both robust performance and a distinct aesthetic. The Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly falls squarely into the latter category. This is not your run-of-the-mill mil-spec receiver extension; it’s a piece that immediately sets an AR-15 build apart with its unique hexagonal profile. My journey to this particular buffer tube began with a desire to move away from the utilitarian, and potentially less durable, standard offerings for a rifle-length build that prioritized both form and function. I’d seen a few custom builds sporting unique buffer tubes, and the Hexone’s geometry immediately caught my eye. Initial impressions upon unboxing were strong; the machining felt precise, and the material selection of 7075 T7 aluminum spoke of quality. Compared to the bland, cylindrical tubes I’d previously used, this Phase 5 offering presented a compelling alternative that promised more than just basic functionality. It’s a component that sparks curiosity and a desire to see how it integrates into a complete rifle.

Real-World Testing: Putting Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly to the Test

First Use Experience

My testing environment for the Hexone AR15 rifle buffer tube was primarily at my home workshop and the local outdoor range. The initial installation was straightforward, fitting seamlessly onto a standard mil-spec lower receiver. I paired it with a fixed stock designed for rifle-length buffer tubes. The hexagonal shape, while visually striking, presented no immediate installation challenges. I cycled the rifle through its functions multiple times, dry firing and engaging inert targets. The assembly provided a solid, wobble-free connection between the lower receiver and the stock, a crucial element for any reliable rifle.

During my initial range session, the Hexone tube performed without a hitch. I ran about 100 rounds of various 5.56 NATO loads through the rifle. The buffer system cycled as expected, with no signs of malfunction or degradation in performance. The unique shape of the tube did not interfere with the stock’s operation or my cheek weld, which was a pleasant surprise.

Extended Use & Reliability

Over the course of several months, this Phase 5 buffer tube assembly has seen continuous use. It’s been on the bench for tune-ups, traveled to the range numerous times, and even endured a light dust storm during an extended outdoor session. The 7075 T7 aluminum construction has proven its worth; there are no visible cracks, significant scuffs, or deformities, despite being subjected to the typical rigors of firearm use.

Cleaning and maintenance have been remarkably simple. A quick wipe down with a solvent-dampened cloth and a dry brush is usually all it takes to keep it free of carbon buildup and debris. Unlike some cheaper aluminum components that can develop a dull finish with heavy handling, the Hexone maintains its look. Compared to previous mil-spec tubes I’ve used, which occasionally showed wear marks from stock adjustments, this Hexone unit appears far more resilient. The included castle nut and end plate have also held up exceptionally well, with no signs of stripping or excessive wear.

Breaking Down the Features of Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly

Specifications

The Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly is a rifle-length receiver extension, precision machined from USA sourced raw billet 7075-T7 aluminum. Its defining characteristic is its hexagonal profile, offering a much thicker and more rugged design than standard mil-spec tubes. The external dimensions are notable: an Edge to Edge OD of 1.4 inches and a Flat to Flat OD of 1.25 inches. This robust construction is further enhanced by a rugged tumbling process that strengthens the exterior while ensuring smooth, snag-free surfaces. This model is specifically noted as not designed to accept a pistol brace, which is important for builders. The complete assembly includes the HexOne Rifle Length Buffer Tube, a Castle Nut, and an End Plate.

These specifications translate directly into tangible benefits. The use of 7075-T7 aluminum is a premium choice, known for its strength and corrosion resistance, far superior to cheaper 6061 variants often found in less expensive buffer tubes. The hexagonal design, while primarily aesthetic, offers increased rigidity and surface area, potentially dissipating heat slightly better than a simple cylinder, though this is a subtle benefit in most AR-15 applications. The larger diameter compared to a mil-spec tube (typically around 1.14 inches edge-to-edge) means it provides a much more substantial feel and is less prone to deformation under stress. The inclusion of the castle nut and end plate as a complete assembly ensures compatibility and simplifies the build process.

Performance & Functionality

The primary function of any buffer tube is to house the buffer and recoil spring, guiding them to manage the bolt carrier group’s movement during cycling. The Hexone AR15 rifle buffer tube performs this role exceptionally well. Its internal diameter is consistent with mil-spec requirements, allowing standard AR-15 buffers and springs to function flawlessly. I experienced no binding, resistance, or any anomalies during rapid firing sequences.

A key strength of this assembly is its rock-solid attachment. The castle nut and end plate interface is exceptionally secure, and when properly staked or torqued, there is absolutely zero wiggle or play. This contributes significantly to the overall stability and perceived quality of the firearm. The lower slot machined into the tube is also a thoughtful detail, helping to ensure proper alignment with the lower receiver and preventing any potential rotation. For those concerned about battery assist devices or specific stock alignments, this is a welcome feature.

Design & Ergonomics

Visually, the Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly is a standout. The hexagonal design is clean, modern, and immediately differentiates a rifle from the sea of standard AR platforms. The machined finish is uniform and attractive, and the tumbling process leaves it feeling smooth to the touch, free from any sharp edges that could snag on clothing or gear.

Ergonomically, this tube doesn’t significantly alter the feel of the rifle unless you’re specifically trying to use it without a stock. However, the slightly larger diameter feels more substantial when gripping the rifle behind the receiver. The integrated lower slot and anti-tilt technology are functional design elements that enhance reliability without compromising the minimalist aesthetic. It’s clear that Phase 5 Weapon Systems Inc put thought into both form and the practical implications of their design choices.

Durability & Maintenance

As previously mentioned, the durability of the Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly appears to be excellent. The 7075 T7 aluminum is a workhorse material for firearm components, and the added strengthening from the tumbling process should only increase its lifespan. I have not observed any signs of premature wear or stress fractures, even after repeated disassembly and reassembly for cleaning.

Maintenance is straightforward. Standard firearm cleaning solvents and lubricants are perfectly suitable. The smooth finish makes it easy to wipe down. The castle nut and end plate are also robust and require no special care beyond standard checks for tightness. Given the materials and build quality, this Hexone tube is built to last for the life of most AR-15 builds.

Accessories and Customization Options

The Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly comes with the essential components for installation: the HexOne Rifle Length Buffer Tube, a Castle Nut, and an End Plate. This is a complete package that allows for direct installation onto a compatible lower receiver.

While the tube itself isn’t designed for extensive external customization beyond the finish (which can be painted or coated), its true compatibility lies in what it holds. It accepts standard AR-15 rifle buffers and recoil springs. Critically, its larger diameter means it’s designed to work with specific stocks that can accommodate this size, or fixed stocks that have a wider opening. As noted in user feedback, it may not fit inside certain aftermarket adjustable stocks or some monolithic upper receiver designs that have very tight tolerances. Compatibility with stocks is the main consideration here.

Pros and Cons of Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly

Who Should Buy Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly?

This Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly is an excellent choice for AR-15 enthusiasts who are building a rifle-length platform and prioritize both robust construction and a unique aesthetic. It’s ideal for builders looking to create a distinctive rifle that stands out from standard builds. If you are opting for a fixed stock or a compatible adjustable stock that can accommodate the slightly larger diameter, this buffer tube will provide a strong, reliable, and visually striking foundation. It’s a component for the builder who appreciates quality materials and thoughtful design.

Conversely, anyone building a compact AR pistol or an SBR that requires a pistol brace should look elsewhere, as this tube is explicitly not designed for that purpose. Furthermore, if your build plan involves a stock known to have very tight tolerances for buffer tubes, you should carefully verify compatibility before purchasing. For those prioritizing the absolute lowest cost and a purely utilitarian component, a standard mil-spec buffer tube might suffice.

Conclusion on Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly

The Phase 5 Weapon Systems Inc Hexone AR15 Rifle Buffer Tube, /Complete Assembly is a premium upgrade that successfully blends robust functionality with a striking visual appeal. Its construction from 7075 T7 aluminum, coupled with a unique hexagonal profile and a strengthening tumbling process, makes it a durable and reliable component for any rifle-length AR-15 build. The included castle nut and end plate complete a package that promises a secure and stable integration.

While the price point is higher than basic mil-spec options, the quality of materials, precision machining, and distinctive design offer significant value. The main caveat for potential buyers is ensuring stock compatibility, as the larger diameter can restrict its use in certain applications. However, for builders seeking a unique, high-quality receiver extension that offers both form and function for their rifle builds, this Hexone buffer tube is an excellent and highly recommended choice.