M16A2 Build A Detailed Guide To My Mostly Complete Rifle Project

Hey guys! Today, I'm super stoked to walk you through my M16A2 build. It's been a project I've been chipping away at for a while, and I'm finally at a point where I can share the (mostly) finished product. I say mostly because, as you know, these projects are never truly done, are they? There's always something else to tweak, upgrade, or obsess over. But for now, I'm incredibly happy with where it's at. This build isn't just about putting parts together; it's about understanding the history and the nuances of the M16A2, a true icon in the firearms world. Let's dive in!

Why the M16A2?

So, why the M16A2? That's a valid question! For me, it's a combination of a few things. Firstly, there's the nostalgia factor. I grew up seeing the M16A2 in movies, video games, and in the hands of our service members. It's a classic, instantly recognizable profile. It represents a specific era in firearms history, and I wanted to own a piece of that. But it's not just about looks; the M16A2 also has some very practical features that I appreciate. The fixed carry handle is incredibly sturdy and provides a great sight picture with iron sights. The 20-inch barrel offers excellent ballistics and accuracy, making it a fantastic rifle for a variety of applications. Plus, the A2 configuration includes improvements over the original M16A1, such as a heavier barrel profile for better heat dissipation and a more robust rear sight. These upgrades make it a more reliable and capable platform overall. When you consider the history, the aesthetics, and the functionality, the M16A2 is just an awesome rifle to own and build. This project was more than just assembling parts; it was about connecting with the legacy of this iconic firearm. There's a certain satisfaction in building something that has served in the hands of soldiers and law enforcement officers for decades. And honestly, there's something inherently cool about the classic A2 look. It's clean, it's functional, and it's timeless. For those who appreciate the history of firearms and the evolution of the AR-15 platform, the M16A2 holds a special place. It represents a pivotal moment in the development of the modern rifle, bridging the gap between the early AR-15 designs and the more modular platforms we see today. Building my own M16A2 has been a journey of learning and appreciation, and I'm excited to share the details with you.

The Foundation: Starting with the Lower Receiver

The heart of any AR-15 build is the lower receiver, and my M16A2 was no different. I opted for an A2-style lower receiver to maintain the rifle's classic aesthetics. The lower receiver is the serialized part, so this was the first component I had to acquire. The process of choosing a lower can seem daunting, with so many manufacturers and options available. I spent a lot of time researching different brands, reading reviews, and comparing features. Ultimately, I went with a reputable manufacturer known for their quality and attention to detail. Once I had the lower in hand, the real fun began! The lower receiver is where all the fire control components are housed, including the trigger, hammer, sear, and safety selector. It's also where the magazine is inserted and the buttstock is attached. Assembling the lower receiver is a relatively straightforward process, but it does require some specialized tools, such as a roll pin punch set, a lower receiver vise block, and an armorer's wrench. There are tons of great resources online, including videos and tutorials, that can guide you through the process step-by-step. I highly recommend watching a few before you start, just to get a good understanding of what's involved. One of the key things to pay attention to when assembling the lower is the proper installation of the small springs and detents. These tiny parts can be easily lost or damaged, so it's important to work carefully and methodically. I found it helpful to use a small parts tray to keep everything organized. With a little patience and the right tools, assembling the lower receiver is a very rewarding experience. It's the first major step in building your rifle, and it sets the stage for the rest of the project. Plus, it's a great way to learn about the inner workings of your firearm. Building the lower yourself allows you to customize it to your preferences. You can choose the trigger you want, the safety selector you prefer, and even the pistol grip that feels best in your hand. This level of personalization is one of the biggest advantages of building your own AR-15.

The Upper Receiver Assembly: Barrel, BCG, and Handguards

Moving on to the upper receiver, this is where things get really interesting. The upper receiver houses the barrel, bolt carrier group (BCG), and handguards, which are all crucial components for the rifle's performance and function. For my M16A2 build, I wanted to stay true to the original specifications, so I opted for a 20-inch barrel with a 1/7 twist rate. The 1/7 twist is ideal for stabilizing heavier bullets, which are commonly used in 5.56 NATO ammunition. The barrel is arguably the most important component of the upper receiver, as it directly affects the rifle's accuracy and range. When choosing a barrel, it's important to consider the material, the manufacturing process, and the twist rate. I went with a chrome-lined barrel, which offers excellent corrosion resistance and durability. Installing the barrel requires an armorer's wrench and a vise block to secure the upper receiver. It's important to torque the barrel nut to the manufacturer's specifications to ensure proper alignment and headspace. Next up is the BCG, which is responsible for extracting and ejecting spent casings, chambering new rounds, and cycling the action. The BCG is a complex assembly with several critical components, including the bolt, bolt carrier, firing pin, and gas key. I chose a high-quality BCG from a reputable manufacturer to ensure reliable performance. The BCG should be properly lubricated before installation to ensure smooth operation. With the barrel and BCG installed, it was time to add the handguards. The M16A2 is known for its distinctive triangular handguards, which are made of a durable polymer material. These handguards provide a comfortable grip and protect the shooter's hand from the heat of the barrel. Installing the handguards is a simple process that involves sliding them into place and securing them with a delta ring. The upper receiver assembly is a critical step in the M16A2 build, and it's essential to choose quality components and assemble them correctly. With a little attention to detail, you can create an upper receiver that will provide years of reliable service.

Iron Sights and the Carry Handle: Staying True to the A2

One of the defining features of the M16A2 is its fixed carry handle and iron sights. This is a departure from the flattop uppers that are common on modern AR-15s, but it's a key element of the A2's classic look and functionality. The carry handle provides a sturdy and reliable platform for the rear sight, which is adjustable for both windage and elevation. The front sight is a simple post that is also adjustable for elevation. Many people might think that in this day and age of red dots and scopes, that iron sights are obsolete. I completely disagree. Iron sights are incredibly durable and reliable, and they don't require batteries or any other external power source. They're also a great way to learn the fundamentals of marksmanship. Learning to shoot accurately with iron sights will make you a better shooter overall, regardless of what optics you use in the future. The M16A2's iron sight system is particularly well-designed. The rear sight aperture is small and precise, providing a clear sight picture. The front sight post is easy to see and adjust. With a little practice, you can become very proficient at shooting with these sights. Of course, the carry handle also serves its primary purpose: to carry the rifle. While it might seem like a minor detail, the carry handle is actually quite useful, especially when you're carrying the rifle for extended periods. It provides a comfortable and secure grip, and it distributes the weight of the rifle evenly. For me, the carry handle and iron sights are essential elements of the M16A2's charm. They're a reminder of a different era in firearms design, when simplicity and reliability were paramount. While modern optics have their advantages, there's something to be said for the classic iron sight system. It's a testament to the ingenuity of the designers of the M16A2, and it's one of the reasons why this rifle remains so popular today.

The Furniture: Stock, Pistol Grip, and Handguards

The furniture of a rifle, which includes the stock, pistol grip, and handguards, plays a crucial role in its ergonomics and handling. For my M16A2 build, I wanted to use furniture that was as close to the original specifications as possible. The M16A2 features a fixed stock, which is longer than the adjustable stocks found on many modern AR-15s. The fixed stock provides a stable and consistent cheek weld, which is important for accurate shooting. It also helps to balance the rifle, making it more comfortable to carry and shoot. The pistol grip on the M16A2 is a simple A2-style grip, which is made of a durable polymer material. This grip is slightly more ergonomic than the original M16A1 grip, providing a more comfortable and secure hold. The handguards, as I mentioned earlier, are the distinctive triangular handguards that are characteristic of the M16A2. These handguards are made of a heat-resistant polymer material, and they provide a comfortable grip while protecting the shooter's hand from the heat of the barrel. When choosing furniture for your AR-15 build, it's important to consider your personal preferences and needs. Some people prefer adjustable stocks, which allow them to customize the length of pull to their body size and shooting style. Others prefer different pistol grip angles or textures. For me, the classic M16A2 furniture is perfect. It's simple, functional, and durable. It also contributes to the rifle's iconic appearance. The choice of furniture can greatly impact the overall feel and handling of the rifle. A well-chosen set of furniture can make the rifle more comfortable to shoot, easier to control, and more accurate. That's why it's important to take the time to research your options and choose furniture that is right for you. Whether you're building a classic M16A2 clone or a modern AR-15, the furniture is an important part of the equation. It's the interface between you and the rifle, and it plays a significant role in your shooting experience.

Final Thoughts and Range Time!

So, there you have it! My (mostly) complete M16A2 build. It's been a fun and rewarding project, and I'm incredibly happy with the result. Building this rifle has given me a deeper appreciation for the M16A2 and its place in firearms history. It's not just a rifle; it's a piece of American history. Of course, the real test of any rifle is how it performs at the range. I'm eager to get out and put some rounds through this M16A2 and see how it shoots. I'm expecting it to be accurate and reliable, based on the quality of the components I've used. But beyond the performance, I'm also looking forward to the experience of shooting this classic rifle. There's something special about shooting an M16A2. It's a connection to the past, and it's a reminder of the sacrifices that have been made to protect our freedoms. If you're considering building your own AR-15, I highly recommend it. It's a great way to learn about firearms, and it's incredibly satisfying to build something with your own hands. Plus, you can customize it to your exact specifications. Whether you're building a classic M16A2 clone or a modern tactical rifle, the possibilities are endless. Just be sure to do your research, use quality components, and follow all safety precautions. Building a firearm is a serious responsibility, but it's also a very rewarding experience. I hope you've enjoyed this walkthrough of my M16A2 build. Stay tuned for future updates and range reports. And as always, thanks for reading!