What Is the Most Common Assault Rifle?

Table of Contents

1. Introduction
2. Defining the Assault Rifle
3. The Global Heavyweight: The AK-47
4. The Western Standard: The AR-15 and M16
5. Comparison: AK-47 vs. AR-15/M16
6. Other Common Global Platforms
7. Logistics and Ammunition Commonality
8. Training on the Standards
9. How to Evaluate a Rifle Platform
10. The Future of the Assault Rifle
11. Building Your Kit Around the Platform
12. Conclusion
13. FAQ

Introduction

Walking onto a range or into a gear locker, you see certain silhouettes that are unmistakable. Whether you are a veteran who carried a service rifle or a prepper building a home defense kit, knowing which platforms dominate the landscape is critical for understanding logistics, parts availability, and global proliferation. We see a lot of gear pass through our hands, and the question of what constitutes the "standard" rifle is one we hear often.

At Crate Club, we focus on the tools that professionals actually use in the field, from optics to maintenance gear. If you want a direct next step, choose your Crate Club tier and build from there. This article breaks down the technical definition of an assault rifle and identifies the most common platforms found across the globe and within the United States. We will look at why the AK-47 holds the title of the most produced firearm in history and why the AR-15/M16 family remains the gold standard for Western operators. Understanding these platforms helps you make informed decisions about your own tactical loadout.

Quick Answer: The AK-47 and its variants are the most common assault rifles in the world, with an estimated 75 to 100 million units produced. In the United States, the AR-15/M16 family is the dominant platform for both military and civilian use due to its modularity and domestic logistics.

Defining the Assault Rifle

Before identifying the most common models, we must define what an assault rifle actually is. In the tactical community, terms often get blurred by media or political rhetoric. A true assault rifle is a specific technical category of firearm.

To be classified as an assault rifle, a weapon must meet four primary criteria:

1. It must be an individual weapon.
2. It must have a detachable magazine.
3. It must use an intermediate cartridge (more powerful than a pistol round but less than a full-power battle rifle round).
4. It must have select-fire capability, meaning it can switch between semi-automatic and burst or fully automatic fire.

Intermediate cartridges like the 5.56x45mm NATO or the 7.62x39mm Soviet are the hallmark of this category. They allow for a high volume of fire and manageable recoil while providing enough lethality at typical combat distances.

Many civilians own semi-automatic versions of these rifles, often called Modern Sporting Rifles (MSRs). While they look identical to their military counterparts, the lack of a select-fire switch means they do not technically meet the definition of an "assault rifle." However, because their parts and ergonomics are largely identical, they are often discussed in the same breath.

The Global Heavyweight: The AK-47

The Avtomat Kalashnikova model 1947, or AK-47, is the undisputed king of global proliferation. Designed by Mikhail Kalashnikov, this rifle was built for the Soviet conscript. It is simple to operate, difficult to break, and incredibly cheap to manufacture.

Why It Dominates

The Soviet Union did not just build the AK-47; they exported the manufacturing process to virtually every satellite state and ally. China, Poland, Romania, and dozens of other nations produced their own versions, like the Chinese Type 56. This resulted in a global supply chain that makes the AK-47 ubiquitous in every conflict zone on the planet. If you want a deeper breakdown of the chambering side of the platform, the AK-47 caliber guide is a useful companion.

Durability is the AK’s primary selling point. The rifle was designed with loose tolerances. This means that even when the internals are fouled with mud, sand, or carbon, the reciprocating mass of the heavy bolt carrier is usually enough to force the gun into battery. It is a "run it dirty" machine.

The 7.62x39mm Factor

The AK-47 chambering, 7.62x39mm, is just as common as the rifle itself. It provides excellent barrier penetration and "thump" at close to medium ranges. For a prepper, the commonality of this round is a double-edged sword. While it is available worldwide, in the United States, the supply is often tied to import cycles.

Field Note: While the AK is famous for reliability, it lacks the modularity of Western systems. Standard AKs require specialized mounts for optics (NVGs or red dots) and do not have the "plug and play" rail systems found on the AR-15. If you run an AK, your training must account for its unique manual of arms, such as the right-side charging handle and paddle magazine release.

The Western Standard: The AR-15 and M16

In the United States and among NATO allies, the AR-15/M16 family is the most common platform. Designed by Eugene Stoner and originally manufactured by ArmaLite, the design was a radical departure from the heavy wood-and-steel rifles of the past.

The Modular King

The M16 and its carbine variant, the M4, are built on a "chassis" system. The rifle is split into an upper receiver and a lower receiver. This modularity is why the AR-15 is the most popular rifle in the U.S. today. You can swap a barrel, a trigger, or a buttstock in minutes with basic tools. If you want a deeper look at chambering, the AR-15 caliber guide covers it in detail.

The M4 Carbine is currently the primary infantry weapon for the U.S. military. Because of the sheer volume of veterans returning from service who are intimately familiar with the M4, the civilian AR-15 has become the default choice for the American tactical community.

Accuracy and Ergonomics

Unlike the AK-47, the AR-15 was designed for precision. The direct impingement (DI) gas system reduces the reciprocating mass, making the rifle easier to keep on target during rapid fire. The ergonomics—specifically the thumb-operated safety and the bolt catch—are widely considered the best in the world for an infantry rifle. If you are evaluating optic setups, red dot sight accuracy is worth a look.

Comparison: AK-47 vs. AR-15/M16

When evaluating the most common rifles, we have to look at how they stack up for the end user. Most operators have a preference, but the choice usually comes down to the environment and logistics.

The AK-47 is the rifle you want if you have zero access to cleaning kits or spare parts for months. The AR-15 is the rifle you want if you need to hit a target at 400 yards or need to mount a variety of lights, lasers, and optics. For a civilian prepper in the U.S., the AR-15 is almost always the smarter choice because parts—springs, pins, and bolts—are available at every local gun shop.

Other Common Global Platforms

While the AK and AR families represent the vast majority of the world's assault rifles, a few other platforms have significant footprints.

The FN FAL

Often called "The Right Arm of the Free World," the FN FAL was the standard for many NATO countries during the Cold War. While it is a battle rifle (firing the full-power 7.62x51mm NATO round), its select-fire variants were the primary competition for the AK-47 for decades. It is still found in large numbers across Africa and South America.

The HK G3

The Heckler & Koch G3 uses a roller-delayed blowback system. It is incredibly rugged and has been licensed for production in countries like Iran, Pakistan, and Turkey. Like the FAL, it is more of a battle rifle, but it fills the same tactical niche in many global inventories.

The Steyr AUG

The AUG is the most common bullpup assault rifle. By placing the action behind the trigger, the rifle maintains a full-length barrel in a much shorter overall package. It is the standard issue for the Austrian and Australian militaries. While not as common as the AK, it is a highly recognized and effective platform.

Key Takeaway: Commonality is a tactical advantage. When you choose a platform that is "common," you are ensuring that in a SHTF (Sustained Hostile Threat Factor) or supply chain failure, you can scavenge magazines, parts, and ammunition from the environment or from teammates.

Logistics and Ammunition Commonality

In a survival or tactical scenario, the most common rifle is only as good as the most common ammunition. In the United States, the 5.56x45mm NATO and .223 Remington are the most prevalent rifle cartridges. Every law enforcement agency and military branch uses them.

When we curate gear for our Captain tier at Crate Club, we often include tools that support these common calibers. This includes cleaning kits, magazine pouches (MOLLE-compatible), and sighting systems designed for the ballistics of these rounds.

Standardization is a core principle of military logistics. If your squad all runs AR-15s, you can share magazines. If one person runs a niche platform like a CZ Bren or a SCAR-17, they are an "island" regarding logistics. For a serious prepper, sticking to the "most common" platforms is a disciplined choice, not a boring one.

Training on the Standards

Because the AK and AR are the most common, you should be proficient in both. Even if you only own an AR-15, you should know how to clear a malfunction on an AK and how to operate its safety. In a battlefield pick-up scenario, that knowledge is the difference between life and death, and a firearm maintenance guide can help keep either platform ready.

1. Manual of Arms: Learn where the controls are. The AK safety is a large lever on the right; the AR is a switch on the left.
2. Maintenance: Know how to field strip both. The AR requires pushing two pins; the AK requires removing a dust cover and a recoil spring.
3. Sighting: Understand the "iron sights" of both. AKs typically use a tangent notch sight; ARs use an aperture (peep) sight.

We believe that being an "operator" isn't just about the gear you own—it's about the versatility of your skills. Our community of tactical enthusiasts often discusses the merits of these platforms, but the consensus is always the same: proficiency beats preference.

How to Evaluate a Rifle Platform

If you are looking to add one of these common platforms to your kit, you need to evaluate them based on your specific mission. Are you looking for a "truck gun" that can get banged around and still fire? The AK might be your winner. Are you looking for a home defense tool that you can customize with a suppressor and a light? The AR-15 is the logical choice. If you want to compare accessories, browse the Gear Shop.

Weight and Balance: The M4 is generally lighter and better balanced than a stamped-steel AKM. Range: The 5.56mm round has a flatter trajectory, making it easier to hit targets at 300+ yards. Customization: The AR-15 has an endless aftermarket. You can change everything from the grip angle to the gas port size.

Field Note: Don't fall for the "cheap" rifle trap. Whether it's an AK or an AR, the most common rifles are often cloned by low-quality manufacturers. Stick to established brands used by professionals, such as Sig Sauer, Magpul (for furniture), and other vetted manufacturers.

The Future of the Assault Rifle

The U.S. military is currently transitioning from the M4 to the XM7 (SIG Sauer MCX-Spear) as part of the Next Generation Squad Weapon (NGSW) program. This new rifle moves away from the 5.56mm round in favor of the 6.8x51mm.

However, it will take decades for this to replace the M4 in the "most common" rankings, and a recent Supply Drop - Major LIII is a good reminder that practical gear still matters. The millions of M16s and M4s currently in circulation ensure that the AR platform will remain the dominant Western rifle for the foreseeable future. Similarly, no rifle is poised to unseat the AK-47's global numbers anytime soon.

Building Your Kit Around the Platform

Once you have identified your primary rifle, the next step is building the support system. A rifle is just a club without ammunition, and it's a "miss-machine" without proper training and maintenance. A rifle sling guide is a smart place to start.

At Crate Club, we provide the gear that fills the gaps in your loadout. From high-quality IFAKs (Individual First Aid Kits) to tactical lights and multi-tools, we help you prepare for the reality of running these platforms. If you are rounding out the rest of your setup, shop tactical gear for practical items that keep your kit moving.

Essential Rifle Support Gear:

• High-quality Sling: A two-point sling is the standard for retention and stability.
• Optics: A reliable Red Dot Sight (RDS) or Low Power Variable Optic (LPVO).
• Cleaning Kit: Specifically sized for your caliber (5.56 or 7.62).
• Light: A weapon-mounted light (WML) is mandatory for any defensive rifle.

Bottom line: The AK-47 is the world's most common assault rifle by volume, but the AR-15/M16 family is the most relevant and common for the American tactician.

Conclusion

The AK-47 and AR-15 dominate the landscape for a reason. One offers unparalleled ruggedness and global availability, while the other offers precision, modularity, and superior ergonomics. For the US-based operator or prepper, the AR-15 is the most practical choice due to the deep domestic supply chain for parts and ammunition.

Preparation is about more than just owning a rifle; it is about having a vetted system that works when the stakes are high. By choosing a common platform, you ensure that you are part of a massive logistical network that can sustain your gear over the long haul.

Join a community that takes this gear as seriously as you do. Whether you need the fundamentals or professional-grade equipment, explore the General tier and see how we build a kit that is hand-picked and field-tested by Spec Ops veterans. Stay ready.

FAQ

Is the AK-47 still the most used rifle in the world?

Yes, the AK-47 and its numerous variants remain the most used and produced firearms globally. Estimates suggest that one out of every five firearms in the world is an AK-type rifle, largely due to its simple design and the sheer volume of production in former Soviet and Eastern Bloc countries.

Why do US civilians prefer the AR-15 over the AK-47?

While both are popular, the AR-15 is preferred in the US because it is domestically manufactured, making parts and repairs much easier to manage. Additionally, its modular design allows users to easily customize the rifle for different roles, such as hunting, competition, or home defense, which is more difficult with the AK platform.

What is the difference between a battle rifle and an assault rifle?

The primary difference is the caliber. An assault rifle uses an intermediate cartridge, like 5.56x45mm, which allows for select-fire control and more ammunition to be carried. A battle rifle uses a full-power cartridge, like 7.62x51mm (.308 Win), which provides more range and power but results in significantly higher recoil.

Can I buy a real assault rifle in the United States?

Under the National Firearms Act (NFA) of 1934 and the Firearm Owners Protection Act (FOPA) of 1986, civilians can only purchase select-fire "assault rifles" that were manufactured and registered before May 19, 1986. These items are heavily regulated, require a $200 tax stamp, an extensive background check, and are generally very expensive due to their limited supply.