The Ultimate Guide to AR9 Pistols and Rifles [2024]

The AR9 platform has surged in popularity, offering a versatile and compact solution that combines the modularity of the AR-15 with the affordability and availability of 9mm ammunition. Whether you're a seasoned shooter or a novice looking to get into the world of AR9s, this guide will cover everything you need to know about AR9 pistols and rifles.

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What is an AR9?

An AR9 is essentially an AR-15 that has been adapted to fire 9mm ammunition. These firearms maintain many of the same features and functions as their larger-caliber counterparts, including the familiar AR-style controls, modularity, and customization options. The key difference lies in the caliber and the magazine compatibility. AR9s typically use Glock, Colt SMG or other popular pistol magazines, making them a cost-effective and versatile option for shooters who already own 9mm pistols.

Advantages

The AR9 platform brings a lot to the table for firearm enthusiasts, blending the best features of the AR-15 with the practicality of 9mm ammunition.

John Wayne With a Wincester and Colt Revolver Source

While this convenience may seem like a new concept, remember the cowboys would carry a revolver and rifle that shared the same caliber. Today you can carry an AR9 that will accept the same mag and ammo as the Glock 9mm on your hip.

Smith & Wesson Response 9mm Carbine

Another standout benefit is the cost-effectiveness. 9mm ammo is significantly cheaper than rifle calibers like .223/5.56, which means you can shoot more without spending as much. Plus, if you already own a 9mm pistol, you might be able to use the same magazines, saving you even more money.

Recoil is another area where the AR9 shines. The 9mm round produces less kick compared to larger rifle rounds, making it much easier to handle. This is particularly beneficial for new shooters or those who prefer a softer shooting experience. Less recoil also means you can get back on target quicker, which is great for both competitive and defensive shooting.

For home defense, the AR9 is a solid choice. AR9 pistols are compact and easy to maneuver in tight spaces like hallways and rooms. The 9mm round also has reduced over-penetration compared to rifle rounds, which is a big plus for keeping your family and neighbors safer.

Smith & Wesson Response Showing How to Swap Magazine Type

Customization is another big draw. The AR9 retains the modular design of the AR-15, allowing you to easily swap out parts and accessories. Whether you want a pistol for close-quarters defense or a rifle for longer-range shooting, you can set it up to fit your specific needs. And with a wide range of aftermarket parts available, you can truly make the AR9 your own.

Lastly, the AR9 is just plain fun to shoot. The low recoil, affordable ammo, and customization options make it a blast to take to the range. Whether you’re looking for something for home defense, target practice, or just to have a good time, the AR9 has something to offer.

A Brief History

The AR9's roots can be traced back to the development of the AR-15 platform by Eugene Stoner in the late 1950s. The original AR-15 was designed for military use and chambered in 5.56 NATO. As the AR-15 gained popularity among civilian shooters, its modular design inspired many adaptations, including the AR9.

The AR9 emerged as a popular configuration in the early 21st century, driven by the demand for a firearm that combined the familiar ergonomics of the AR-15 with the affordability and lower recoil of the 9mm round. Many companies have started producing an AR9. Colt, Smith & Wesson, CMMG, Rock River Arms, Christensen, Early AR9s often suffered from reliability issues due to the challenges of adapting the AR-15’s design to a pistol caliber, but advancements in engineering and design have since resolved many of these problems, making modern AR9s highly reliable and widely accepted in the shooting community.

AR9 Pistols vs. AR9 Rifles

AR9s come in both pistol and rifle configurations, each with its unique set of benefits and drawbacks. Choosing between the two will depend on your intended use and personal preferences.

AR9 Pistols

AR9 pistols are characterized by their shorter barrels (under 16 inches) and the absence of a stock, though they may have a brace. These features make them extremely compact and portable, ideal for close-quarters scenarios. However, the shorter barrel can result in reduced accuracy and velocity.

AR9 Rifles

AR9 rifles, on the other hand, have longer barrels (16 inches or longer) and are equipped with a stock, providing better stability and accuracy. These are better suited for situations where precision and longer-range shooting are required. The added barrel length also enhances bullet velocity and energy, making the AR9 rifle a versatile platform for various shooting activities.

Freedom Ordnance FX9 9mm AR9 Pistol

Buying an AR9

Purchasing a pre-built AR9 offers convenience and reliability, as these firearms are assembled and tested by professionals. This option is great for those who want a ready-to-use firearm without the hassle of assembly. With so many options on the market you still flexibility in terms of customization. You also have the option to make aftermarket modifications.

Ammunition

Choosing the right ammunition is crucial for maximizing the performance of your AR9. Here’s a detailed breakdown of the most common 9mm ammunition options available:

Bullet Type

9mm FMJ “Rose” by Sig Sauer

Full Metal Jacket (FMJ)

Description: FMJ rounds feature a soft lead core encased in a harder metal shell, typically copper.

Usage: Ideal for training, plinking, and target shooting due to their affordability and reliability.

Pros:

- Cost-effective

- Consistent performance

- Readily available

Cons:

- Limited expansion upon impact, making them less ideal for self-defense

Self Defense 9mm Ammo

Jacketed Hollow Point (JHP)

Description: JHP rounds are designed with a hollow point that expands upon impact, increasing stopping power.

Usage: Commonly used for self-defense and law enforcement due to their enhanced terminal performance.

Pros:

- Excellent expansion and stopping power

- Reduces the risk of over-penetration

Cons:

- More expensive than FMJ

- Can be less reliable in feeding in some firearms

+P and +P+ Rounds

Description: +P (overpressure) and +P+ rounds are loaded to higher pressures than standard 9mm rounds, providing increased velocity and energy.

Usage: Used for self-defense where maximum stopping power is needed.

Pros:

- Higher velocity and energy

- Improved stopping power

Cons:

- Increased recoil

- Can cause more wear on the firearm

- Not suitable for all firearms (check manufacturer specifications)

Hornady Subsonic 9mm Ammo

Subsonic Rounds

Description: Subsonic rounds are designed to travel at velocities below the speed of sound (typically under 1,100 feet per second).

Usage: Ideal for use with suppressors as they produce less noise.

Pros:

- Reduced noise when used with a suppressor

- Lower recoil

Cons:

- Less energy and stopping power

- Generally more expensive

Bullet Weight

When choosing 9mm ammunition for your AR9, one important factor to consider is the grain weight of the bullet. Grain weight affects performance in terms of velocity, recoil, and terminal ballistics. Here’s a breakdown of the most common grain weights and their respective pros and cons.

115 Grain

Pros:

Higher Velocity: 115-grain bullets typically have higher muzzle velocities due to their lighter weight. This can translate to flatter trajectories and quicker follow-up shots.
Availability and Cost: This is one of the most common grain weights for 9mm ammunition, making it widely available and often the most affordable option.
Reduced Recoil: The lighter bullet weight generally results in less felt recoil, which is beneficial for new shooters or those looking for a more comfortable shooting experience.

Cons:

Penetration: While high velocity can be beneficial, 115-grain bullets may not penetrate as deeply as heavier rounds, which can be a drawback in certain defensive situations.
Wind Sensitivity: Lighter bullets can be more affected by wind, potentially reducing accuracy at longer ranges.

124 Grain

Pros:

Balanced Performance: 124-grain bullets offer a good balance between velocity and bullet weight, making them versatile for various shooting applications.
Recoil Management: Slightly heavier than 115-grain, 124-grain rounds offer a moderate recoil, providing a balance between comfort and control.
Penetration and Expansion: These bullets often achieve better penetration and expansion compared to lighter bullets, enhancing their effectiveness in self-defense scenarios.

Cons:

Cost: While still common, 124-grain bullets can be slightly more expensive than 115-grain options.
Availability: They are widely available but may not be as ubiquitous as 115-grain ammunition, depending on your location and retailer.

147 Grain

Pros:

Deeper Penetration: The heavier weight allows for deeper penetration, which can be crucial in defensive situations where stopping power is paramount.
Subsonic Performance: 147-grain bullets are often subsonic, making them ideal for use with suppressors. The reduced noise and recoil enhance shooting comfort and control.
Wind Resistance: Heavier bullets are less affected by wind, improving accuracy at longer distances.

Cons:

Lower Velocity: Due to their heavier weight, 147-grain bullets typically have lower muzzle velocities, which can result in a more pronounced bullet drop at longer ranges.
Increased Recoil: Heavier bullets generally produce more felt recoil, which can be less comfortable for some shooters.
Cost and Availability: These rounds can be more expensive and less readily available compared to 115 and 124-grain options.

Selecting the right grain weight for your 9mm ammunition depends on your specific needs and preferences.

115 Grain: Ideal for cost-effective shooting with high velocity and reduced recoil. Best for target practice and casual shooting.
124 Grain: Offers a balanced performance suitable for a variety of uses, including self-defense and range practice.
147 Grain: Best for subsonic applications, deeper penetration, and scenarios where suppressor use and wind resistance are important.

Consider these factors when choosing your ammunition to ensure you get the best performance from your AR9.

Top AR9 Models in 2024

The market for AR9s is vast, with numerous manufacturers offering high-quality models. Here are some of the top AR9 pistols and rifles to consider in 2024:

1. Sig Sauer MPX: Known for its reliability and modular design, the MPX is a top choice for both professionals and enthusiasts.

2. CMMG Banshee: This series offers a range of barrel lengths and configurations, with the Banshee 300 being particularly popular for its compact size and performance. It also comes in other calibers.

3. Christensen Arms CA9MM: Christensen Arms makes some of the best hunting rifles and long-range precision rifles in the world. Proudly made in the USA.

4. Freedom Ordnance FX9: Made in the USA. Freedom Ordnance makes one of the best AR9 for the money. Currently they offer 4” 8” 10” & 16” barrel options (18” also for our Canadian friends)

FAQ for AR9 Pistols and Rifles

1. What is an AR9?

Answer: An AR9 is a firearm built on the AR-15 platform but chambered for 9mm ammunition. It combines the modularity and features of the AR-15 with the affordability and availability of 9mm ammo. AR9s are popular for their versatility, ease of customization, and suitability for various shooting applications, including home defense, target shooting, and competition.

2. What are the main differences between an AR9 pistol and an AR9 rifle?

Answer: The primary difference lies in the barrel length and overall configuration:

AR9 Pistol: Features a shorter barrel (typically under 16 inches) and does not have a stock, though it may have a brace. It's more compact and ideal for close-quarters use.
AR9 Rifle: Has a longer barrel (usually over 16 inches) and includes a stock, providing better accuracy and stability for longer-range shooting.

3. What types of magazines do AR9s use?

Answer: AR9s typically use magazines designed for 9mm pistols. The most common types are Glock, Sig, Smith & Wesson & Colt SMG magazines. Some AR9 models may be compatible with other pistol magazines.

4. Can I build my own AR9?

Answer: Yes, building your own AR9 is a popular option for many firearm enthusiasts. It allows for complete customization and a deeper understanding of the firearm. However, it requires a certain level of knowledge, skill, and tools. Many who try to build an AR9 to save money end up spending more that if they just bought one off the shelf. There are many resources available, including online guides and build kits, to help you through the process.

5. What are the advantages of using 9mm ammunition in an AR platform?

Answer: The advantages include:

Cost-Effectiveness: 9mm ammo is generally cheaper than rifle calibers like .223/5.56.
Reduced Recoil: The lower recoil of 9mm makes the AR9 more manageable and comfortable to shoot, especially for beginners.
Versatility: 9mm is suitable for various applications, including target shooting, home defense, and competition.
Compatibility: If you already own a 9mm pistol, you can often use the same magazines and ammo, simplifying logistics and saving costs.

6. Is the AR9 suitable for home defense?

Answer: Yes, the AR9 is well-suited for home defense due to its compact size, lower recoil, and reduced penetration compared to rifle calibers. The 9mm round is effective at stopping threats while minimizing the risk of over-penetration through walls, which is an important consideration in a home defense scenario.

7. What types of 9mm ammunition are best for AR9s?

Answer: The choice of ammunition depends on your intended use:

Full Metal Jacket (FMJ): Ideal for training and target shooting due to its affordability and reliability.
Jacketed Hollow Point (JHP): Best for self-defense because of its expansion upon impact, providing greater stopping power.
+P and +P+ Rounds: Offer higher velocity and energy, suitable for self-defense where maximum stopping power is needed.
Subsonic Rounds: Perfect for use with suppressors, as they reduce noise and recoil.

8. Are there any legal considerations for owning an AR9?

Answer: Legal considerations vary by jurisdiction. In the United States, laws regarding AR9s are similar to those for other firearms. However, regulations on barrel length, overall length, magazine capacity, and features such as braces or stocks can vary by state and locality. Always check your local laws and regulations before purchasing or building an AR9.

9. How does the recoil of an AR9 compare to that of an AR-15?

Answer: The recoil of an AR9 is generally lower than that of an AR-15 chambered in .223/5.56. This makes the AR9 more manageable, especially for new shooters, smaller individuals, or those looking for a firearm with less kick. The reduced recoil also allows for quicker follow-up shots and better control during rapid fire.

10. What are some top AR9 models to consider?

Answer: Some of the top AR9 models in 2024 include:

Sig Sauer MPX: Known for its reliability and modular design.
Smith & Wesson Response Carbine: Built by a recognized name in the industry and has an exceptional warranty.
Freedom Ordnance FX9: Built in the USA and offers upgraded parts at an affordable price.
CMMG Banshee: Offers a range of barrel lengths and configurations, with the Banshee 300 being particularly popular.
Angstadt Arms UDP-9: Lightweight and well-crafted, favored by competitive shooters and home defenders.

This FAQ should provide a solid foundation for anyone interested in AR9 pistols and rifles. Whether you're considering building your own or buying a pre-assembled model, understanding these basics will help you make an informed decision.

Conclusion

The AR9 platform provides a perfect blend of the AR-15's modularity with the practicality of the 9mm round, making it a versatile choice for various shooting applications. Whether you opt for an AR9 pistol or rifle, build your own, or purchase a pre-assembled model, you're investing in a firearm that offers both performance and adaptability. With this guide, you should be well-equipped to make an informed decision and get the most out of your AR9 experience in 2024.

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