ASG MK23 Review: A Comprehensive Look at a Popular Airsoft Sidearm

If you’re seeking an exceptional airsoft sidearm, the ASG MK23 should be at the top of your list. This non-blowback gas pistol is known for its impressive performance, reliability, and stealth capabilities. With its unique features and solid construction, the MK23 has become a favorite among airsoft enthusiasts who prioritize accuracy and stealth.

One of the key reasons you’ll love the ASG MK23 is its remarkably quiet operation, especially when equipped with the included suppressor. This trait allows you to maintain a low profile during games, providing a tactical advantage over your opponents. Additionally, its high gas efficiency ensures that your magazine won’t run out too quickly, giving you more confidence during extended skirmishes.

You can appreciate the MK23’s accurate shooting and impressive range, attributable to its high-quality hop-up system. The pistol’s adjustable hop-up allows you to fine-tune your shots according to distance and BB weight, ensuring you consistently hit your targets. In summary, the ASG MK23 is an exceptional sidearm that excels in performance and stealth, making it a must-have addition to your airsoft arsenal.

ASG Mk23 Overview


The ASG Mk23 is a legendary airsoft pistol modeled after the famous MK23 SOCOM. This weapon was designed for US Special Operations Command (SOCOM) in the 1990s. Today, you can experience its impressive features in the airsoft version.

As an airsofter, you’ll appreciate the ASG Mk23’s accuracy and efficiency. Combining the best aspects of the MK23 SOCOM and the VSR rifle gives you a powerful airsoft weapon you can rely on.


The ASG Mk23 has gained significant popularity among airsoft enthusiasts. It is well-regarded for its:

  • Exceptional accuracy
  • Remarkable range
  • Silent operation

Here are some key features of the ASG Mk23:

  1. Non-blowback system: The non-blowback system reduces gas consumption and allows for more shots per gas fill.
  2. Adjustable hop-up: Customize the hop-up setting to improve the accuracy and trajectory of your shots.
  3. High-capacity magazine: Load up to 28 rounds in the magazine, making it perfect for extended gameplay.

With these features, it’s no surprise that the ASG Mk23 is considered one of the best airsoft sidearms on the market.

Sidearm Comparison

Compact and Lightweight Sidearms

Tokyo Marui Glock 18C AEP

This compact and lightweight airsoft pistol makes it a great option for those who prefer a smaller sidearm. It is powered by an electric motor and is known for its reliable performance and easy maintenance. The Tokyo Marui Glock 18C AEP is also relatively quiet, making it a good choice for players who want to stay stealthy on the field.

KJW KP-13 Gas Blowback Pistol

This airsoft pistol is also compact and lightweight but uses gas as its power source instead of electricity. It is known for its realistic blowback action and high-quality construction and uses green gas or propane as its power source. The KJW KP-13 is a good option for players who want a more realistic shooting experience from their airsoft pistol.

Heavy Metal Gas Blowback Pistols

Heavy metal gas blowback pistols are an excellent option for those looking for a more realistic shooting experience.

Tokyo Marui Desert Eagle Gas Blowback Pistol

This heavy and durable airsoft pistol makes it a good choice for those who want a more realistic shooting experience. It is modeled after the real-life Desert Eagle pistol and is known for its high-quality construction and reliable performance.

The Tokyo Marui Desert Eagle Gas Blowback Pistol uses green gas or propane as its power source, providing strong recoil when fired.

WE-Tech G17 Gen 5 Gas Blowback Pistol

This airsoft pistol is also heavy, durable, and modeled after the real-life Glock 17 Gen 5 pistol. It is known for its realistic blowback action and high-quality construction and uses green gas or propane as its power source. The WE-Tech G17 Gen 5 is a good option for players who want a more realistic shooting experience and who prefer the Glock platform.

Finding the right sidearm for your airsoft kit depends on your preferences and budget. Consider weight, accuracy, and construction factors when choosing a compact, heavy metal, or budget-friendly option.

Design and Features

Retro Styling

The ASG MK23 has a sleek, retro design that sets it apart from other airsoft pistols. The black, matte finish on the full-metal construction gives it a classic and intimidating look. As an airsoft enthusiast, you will appreciate the attention to detail in the replica’s design.

Modifications and Upgrades

  • Upgrade: You can upgrade your ASG MK23 by swapping the standard barrel with a threaded, suppressor-ready one.
  • Tape: Give your MK23 a custom look by wrapping parts of the pistol in camouflage tape.
  • Krylon: Another option is to apply a Krylon paint job to make it stand out on the airsoft field and blend in with your environment.

Aftermarket Parts

The MK23 offers a wide variety of aftermarket parts designed to fit your specific preferences and playstyle. You can enhance performance with upgraded hop-up units, inner barrels, and gas efficiency parts.

Carbine Kits

Transform your MK23 into a lightweight rifle by installing one of the available carbine kits. These kits grant you extra stability and a greater range of customization, allowing you to tailor your weapon for long-range engagements or CQB scenarios.

Performance Analysis

Shooting Range and Accuracy

The MK23 pistol provides exceptional range as a sniper’s sidearm. With its stock hop-up and barrel, you can expect to consistently hit targets at around 50 meters. However, upgrading to a high-quality hop-up bucking and tight bore barrel will improve accuracy and range.

  • Stock range: 50 meters
  • Upgraded range: 65+ meters (depending on the specific upgrades and other factors such as weather conditions and BB weight)

One key factor to consider is the pistol’s gas system. The MK23 uses Non-Blowback (NBB) system, resulting in a quieter shot and increased gas efficiency, ensuring you maintain a low profile on the field.

Minimum Engagement Distance

The MK23 has a reasonably low minimum engagement distance as a secondary weapon. This makes transitioning from your sniper rifle to the pistol easier when engaging targets at closer ranges. Typical minimum engagement distances for the MK23 are:

  • For 0.20g BBs: 10 meters
  • For 0.25g BBs: 12 meters

Your choice of BB weight will impact the pistol’s power and minimum engagement distance. Heavier BBs, such as 0.28g or higher, will result in better accuracy and less wind influence but may slightly increase your piston’s minimum engagement distance.

Cost and Budget Considerations

When considering the ASG MK23, it’s important to factor in the cost of the gun and any additional expenses. The initial price for the pistol usually ranges from $170 to $300, depending on the retailer.

For those on a tighter budget, remember that the MK23 uses green gas or propane, which adds to the overall cost. To mitigate the added expenses, you should:

  • Check for sales or discounts at your local airsoft retailer
  • Purchase gas in bulk to take advantage of lower prices
  • Consider investing in a propane adapter to use more budget-friendly fuel

Upgrades and accessories, such as suppressors, and extra spare magazines, also contribute to the added cost. Weigh your options carefully by:

  1. Determining which accessories are necessary for your gameplay
  2. Comparing prices between different retailers
  3. Considering the compatibility and long-term benefits of each upgrade

Considering the above points, you can make an informed decision about the ASG MK23 and ensure it fits your budget.

Suppression and Stealth


The ASG MK23 comes equipped with a high-quality suppressor that significantly reduces the sound of each shot. This suppressor is easy to attach and remove, making it convenient for you to adapt to various airsoft scenarios. Crafted from durable materials, the suppressor will withstand the rigors of intense gameplay.

Quietness Compared to Other Sidearms

  • Quieter than most sidearms: The ASG MK23 is known for its impressive quietness compared to other airsoft sidearms. With the suppressor attached, your shots will be nearly inaudible, giving you a significant stealth advantage.
  • Great for specific roles: This quietness makes the ASG MK23 perfect for sniper support or stealth reconnaissance roles in airsoft matches. This sidearm can be your go-to choice if you prioritize stealth and suppression.
  • Concealed noise signature: By reducing the noise signature of your shots, you’ll be able to engage opponents without giving away your position, increasing your overall effectiveness on the field.

The ASG MK23’s quietness is a major selling point, so take advantage of this feature to enhance your airsoft experience. After all, stealth can often make the difference between winning and losing in high-stakes airsoft gameplay.

Customizations and Modifications

Holster Options

Finding the right holster for your ASG MK23 is crucial. You can choose from a variety of fits, like soft fabric or rigid polymer holsters. Be sure to prioritize retention, access, and comfort.

Here are some popular options:

  • Universal holsters: They accommodate a wide range of pistols, including the MK23.
  • Specific MK23 holsters: These are tailored exclusively for the MK23, ensuring a secure fit.

Paint Jobs

Personalizing your ASG MK23 with a unique paint job can make it stand out on the field. You can either do it yourself or have it professionally done. Remember to consider the playing environment and camouflage effectiveness.

Consider these styles:

  • Camouflage patterns: Blend in with your surroundings, choosing woodland, urban, or desert camo.
  • Solid colors: Keep it simple with solid colors, like black, tan, or green.

Hop Rubber and Hadron TDC Dust Cover

Upgrading your ASG MK23’s hop rubber and installing a Hadron TDC dust cover can improve the overall performance. Swapping the stock hop rubber for a high-quality one increases accuracy and range, while the Hadron TDC dust cover provides finer hop-up adjustments.


To make these modifications, follow these steps:

  1. Disassemble the slide to access the hop-up chamber.
  2. Replace the hop rubber with a better one.
  3. Install the Hadron TDC dust cover according to the manufacturer’s instructions.
  4. Test and adjust the new setup for optimal performance.

Recommended Upgrades

Mag Release Spring

Upgrading the Mag Release Spring is essential in improving the reliability of your MK23. A stronger spring prevents accidental mag drops while operating. Consider getting a high-quality replacement like the Hadron Designs H-Plate to improve your experience.

Clicky Pen Modification

To enhance your trigger response, consider the Clicky Pen Modification. This mod involves replacing the stock trigger spring with a clicky pen spring, effectively shortening the trigger pull. You’ll notice a significant improvement in responsiveness and overall performance.

Upgrading your ASG MK23 with these recommended mods enhances its performance and ensures a more enjoyable and seamless airsoft experience. Choose the right components and invest in quality to get the most out of your pistol.

Magazine and Gas Efficiency

Winter and Summer Mags

When using your ASG MK23, selecting the right magazine for the climate is crucial. You’ll find both winter and summer mags available. Opt for the winter mag in cold conditions, specifically designed to maintain performance in lower temperatures. The summer mag, on the contrary, works optimally in warm environments.

High and Low-Pressure Gas Release Valves

The efficiency of your ASG MK23 can be significantly affected by the type of gas release valve you choose. There are two options: high-pressure gas release valves and low-pressure gas release valves.

  • High-pressure valves are recommended when you need higher power output and are ready to compensate for the increased gas consumption.
  • Low-pressure valves offer better gas efficiency at lower velocities, which can save your gas usage.

Table: Valve Comparison

Valve TypePower OutputGas Efficiency
High-Pressure Gas Release ValveHighLower
Low-Pressure Gas Release ValveLowerHigher

It’s essential for you, as an airsoft player, to be aware of the relationship between the valve types, gas efficiency, and power output. You can optimize your ASG MK23’s performance for any playing condition by choosing the right combination of magazines and gas release valves.

Performance Extensions

Inner Barrel Extension

Upgrading your ASG MK23 with an inner barrel extension can enhance its accuracy and range. With a longer inner barrel, you’ll notice tighter groupings on the target. A popular choice is the 6.01mm tight bore, which has proven effective in making the most of your backup weapon.

AEG Beating Performance

You can make a few modifications if you’re seeking AEG-level performance from your ASG MK23. First, upgrade your piston head for smoother and faster cycling. This not only increases FPS but also maintains consistency. Couple that with a high-quality hop-up bucking, and you’ll have a built-to-last sidearm with exceptional performance.

Upgraded piston head:

  • Increases FPS
  • Consistent cycling

High-quality hop-up bucking:

  • Improved range and accuracy

These two modifications, combined with the inner barrel extension, will bring your MK23 to an impressive performance level, rivaling some of the top AEGs in the game. With these upgrades, you’ll have a reliable and powerful backup weapon in your airsoft arsenal.

Technical Tips and Resources

Sniper Mechanic Video

To improve the performance of your ASG MK23, watch the excellent Sniper Mechanic video. This resource covers essential tips on gas release valves and floating shots. Use this guide to get the most out of your airsoft experience.

Tools and Technical Side

Here are some necessary tools and information to enhance your ASG MK23:

  • Inner Barrel Extension: Increase accuracy with a longer inner barrel. Make sure to measure and match the required length with your MK23.
  • Gas Release Valve: Maintain the gas release valve to ensure a proper seal and improve gas efficiency. Clean and lubricate it regularly.
  • ASG Mag: Keep your ASG magazine in great condition by always using high-quality BBs and avoiding overloading it.

Floating Shots and Adjustments

To prevent floating shots, consider the following tips:

  • Proper hop-up adjustment: Fine-tune your hop-up to achieve consistent shots and increase your MK23’s accuracy.
  • Clean your barrel: Regularly clean and maintain your barrel to prevent dirt buildup that causes floating shots.

Following these tips and resources will improve your ASG MK23’s performance and gain a competitive edge in airsoft.


The ASG MK23 is an exceptional airsoft pistol that offers a perfect blend of performance, accuracy, build quality and design. This non-blowback pistol’s fixed hop-up design and integrated suppressor deliver impressive accuracy and noise reduction, making it an excellent choice for stealthy airsoft gameplay.

The ASG MK23’s solid construction, lightweight polymer body, and metal inner barrel and trigger mechanism ensure durability and a comfortable grip even during extended use.

While the ASG MK23 comes with a higher price tag compared to other airsoft pistols, its advanced features and capabilities make it a worthwhile investment for airsoft enthusiasts. The combination of precision, power, and stealth that this pistol offers is unrivaled, making it an ideal choice for players who value reliability and performance.

Whether you’re a beginner or an experienced player, the ASG MK23 is a versatile airsoft pistol that will elevate your gameplay to the next level. If you’re looking for a high-quality airsoft pistol that delivers in every aspect, the ASG MK23 is the perfect choice for you.

Frequently Asked Questions

Q. How does the ASG MK23 perform in terms of accuracy?

The ASG MK23 is known for its excellent accuracy, thanks to its fixed hop-up design and inner barrel. You’ll find that hitting targets at long distances is much easier compared to other airsoft pistols.

Q. Is the ASG MK23 suitable for beginners?

Yes, the ASG MK23 is beginner-friendly. Its simple operation, affordability, and user-friendly features make it an ideal choice for those new to airsoft.

Q. What type of gas does the ASG MK23 use?

The ASG MK23 uses green gas, which is widely available and offers easy refilling. Remember to use high-quality gas to maintain optimal performance.

Q. What is the effective range of the ASG MK23?

The effective range of the ASG MK23 is around 50-70 feet. However, with the right upgrades and adjustments, you can potentially extend this range even further.

Q. What type of magazine is compatible with the ASG MK23?

The ASG MK23 is compatible with two types of magazines: the standard magazine with a capacity of 28 rounds and the extended magazine with a larger capacity of 50 rounds.

These options allow shooters to select their preferred magazine size based on their specific needs and shooting preferences. Whether you prefer a compact magazine for convenience or an extended one for prolonged shooting sessions, the ASG MK23 caters to your requirements.

However, it’s important to note that using aftermarket magazines may result in varying performance or potential compatibility issues, so it’s recommended to exercise caution and ensure compatibility before use.

Q. Can I upgrade the ASG MK23?

Absolutely! The ASG MK23 offers a range of upgrade possibilities to enhance its performance. A few popular options include upgraded hop-up buckings for improved accuracy, tighter inner barrels for enhanced precision, custom suppressors to customize their appearance, and enhanced triggers for a smoother shooting experience.

It’s important to ensure the compatibility of aftermarket parts before installation, as not all upgrades may be suitable for every MK23 model. By exploring these upgrade options, you can further customize and optimize the ASG MK23 to suit your specific preferences and needs.

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