SIG Sauer MPX GEN2 ASP Black CO₂ Submachine Review – Premium Tactical Air Rifle

The SIG Sauer MPX GEN2 ASP Black CO₂ Submachine is a premium tactical air rifle designed for shooters who value realistic handling, dependable performance, and modern airgun engineering. As part of the SIG Sauer Airguns range, the SIG Sauer MPX GEN II improves on the original model with updated ergonomics, refined controls, and enhanced accuracy.

Designed to replicate many of the handling characteristics of the firearm-inspired SIG MPX platform, this .177 calibre CO₂ air rifle combines semi-automatic operation with a rifled steel barrel and a patented 30-round rotary belt magazine. It is particularly suited to recreational target shooting, airgun practice, and users looking for a realistic tactical-style platform.

SIG Sauer MPX GEN II Key Features

The second-generation MPX introduces several practical upgrades while retaining the reliable operating system of the original design.

Main Specifications

• Model: SIG Sauer MPX GEN II ASP
• Generation: Generation 2
• Action: Semi-automatic
• Calibre: 4.5 mm / .177 calibre pellets
• Magazine: 30-shot patented Roto Belt Magazine
• Power source: 88g or 90g CO₂ cylinder
• Velocity: Up to approximately 575 FPS, depending on conditions and ammunition
• Power: Approximately 7 joules maximum
• Barrel: Fluted rifled steel barrel
• Stock: Redesigned synthetic stock
• Handguard: M-LOK-style polymer handguard
• Rail: Picatinny accessory rail
• Sights: Folding front and rear sights
• Safety: Manual ambidextrous safety
• Colour: Black
• Overall length: Approximately 654 mm
• Weight: Approximately 3 kg / 6.2 lb

Note: Actual velocity and CO₂ performance can vary depending on pellet weight, temperature, CO₂ pressure, and shooting conditions.

What Has Changed on the SIG Sauer MPX GEN II?

The SIG Sauer MPX GEN II builds upon the original MPX airgun with several design and ergonomic improvements.

The updated model includes:

• Modern M-LOK handguard
• Redesigned buttstock
• Low-profile recoil pad
• Flat-blade trigger
• Reduced-angle pistol grip
• Folding front and rear sights
• Ambidextrous safety controls
• Updated ergonomics
• Improved handling and comfort
• Refined accuracy

These improvements make the SIG MPX GEN II air gun more comfortable to handle while maintaining the distinctive tactical appearance that made the original platform popular.

Semi-Automatic CO₂ Operation

One of the key attractions of the SIG Sauer MPX GEN2 ASP Black CO₂ Submachine is its semi-automatic action. The system allows the shooter to fire a shot with each trigger pull without manually cocking the rifle between shots.

The CO₂-powered operating system is designed for straightforward recreational shooting, while the internal blowback mechanism adds to the realistic handling experience.

For users searching for a semi-automatic CO₂ air rifle in Europe, the MPX GEN II provides a combination of realistic styling, practical controls, and easy-to-use operation.

30-Round Rotary Belt Magazine

The MPX GEN II uses a patented 30-round rotary belt magazine designed for efficient pellet feeding.

The magazine system provides:

• 30-pellet capacity
• Reusable rotary belts
• Consistent pellet feeding
• Quick magazine changes
• Convenient shooting sessions

This design allows shooters to spend more time concentrating on their target rather than repeatedly loading individual pellets.

Accuracy and Shooting Performance

The SIG Sauer MPX GEN II air rifle features a rifled steel barrel designed to provide improved pellet stability and accuracy compared with smoothbore designs.

When paired with suitable .177 pellets, the rifle can deliver consistent recreational target-shooting performance. However, actual velocity and accuracy depend on several factors, including pellet weight, CO₂ temperature, cylinder pressure, and shooting technique.

The semi-automatic action also makes the MPX GEN II particularly enjoyable for shooters who prefer fast follow-up shots.

Build Quality and Tactical Design

SIG Sauer has given the MPX GEN II a robust tactical appearance combined with practical airgun construction. Its synthetic furniture and aluminium receiver components help provide a solid feel, while the overall weight and balance contribute to its realistic handling.

Construction Highlights

• Durable synthetic furniture
• Aluminium receiver components
• Polymer tactical handguard
• Picatinny accessory rail
• Folding sights
• Tactical-style pistol grip
• Rifled fluted steel barrel
• Redesigned stock
• Low-profile recoil pad

The result is an air rifle that looks and feels considerably more substantial than many entry-level CO₂ platforms.

SIG Sauer MPX GEN II Ergonomics

Another major advantage of the GEN II model is its improved ergonomics.

The redesigned grip angle provides a more natural hand position, while the updated stock and recoil pad help improve comfort during extended shooting sessions. Meanwhile, folding sights provide a practical aiming solution and can be folded when alternative optics or accessories are being used where compatible.

The combination of these features makes the SIG Sauer MPX GEN 2 a practical choice for shooters who want modern tactical styling without sacrificing usability.

Why Choose SIG Sauer Airguns?

SIG Sauer Airguns are known for combining firearm-inspired designs with purpose-built airgun engineering. The MPX GEN II continues this approach by offering realistic styling, practical controls, and a familiar tactical configuration.

Key advantages include:

• Realistic firearm-inspired design
• Quality construction
• Semi-automatic CO₂ operation
• Rifled steel barrel
• High-capacity rotary magazine
• Folding sights
• Modern M-LOK handguard
• Picatinny accessory rail
• Comfortable updated ergonomics

For European airgun enthusiasts, the MPX GEN II can be an attractive option for recreational target shooting and responsible airgun training, subject to local laws and regulations.

SIG Sauer MPX GEN II vs Original MPX

The SIG Sauer MPX GEN II retains the core concept of the original model but introduces a number of design improvements.

Compared with the earlier version, the GEN II features an updated handguard, redesigned stock, improved grip angle, flat-blade trigger, enhanced ergonomics, and revised controls.

These changes are intended to make the rifle more comfortable and refined while preserving the familiar MPX platform and semi-automatic CO₂ operating system.

Frequently Asked Questions

What is the SIG Sauer MPX GEN II?

The SIG Sauer MPX GEN II is a CO₂-powered semi-automatic air rifle chambered in 4.5 mm / .177 calibre. It features a rifled steel barrel, 30-round rotary belt magazine, tactical styling, and updated GEN II ergonomics.

Is the SIG Sauer MPX GEN II fully automatic?

No. The MPX GEN II is a semi-automatic air rifle. It fires one pellet for each trigger pull rather than operating as a fully automatic firearm.

What ammunition does the SIG Sauer MPX GEN II use?

The rifle is designed for 4.5 mm / .177 calibre pellets and uses a patented 30-round rotary belt magazine.

What CO₂ cylinder does the MPX GEN II use?

The MPX GEN II is designed to use an 88g or 90g CO₂ cylinder, housed within the detachable stock.

How many pellets does the MPX GEN II magazine hold?

The patented rotary belt magazine has a 30-pellet capacity, allowing multiple shots before reloading.

Is the SIG Sauer MPX GEN II suitable for beginners?

The rifle has straightforward controls and semi-automatic operation, making it accessible to airgun users who are familiar with safe shooting practices. Beginners should always receive appropriate instruction and follow applicable local laws.

Is the SIG Sauer MPX GEN II legal in Europe?

Airgun laws differ considerably between European countries like Germany, Spain, France, and Portugal, including regulations concerning power limits, ownership, transport, storage, and minimum age. Always check the regulations applicable in your specific country before purchasing or using an airgun.

Buy SIG Sauer MPX GEN II CO₂ Air Rifle

The SIG Sauer MPX GEN2 ASP Black CO₂ Submachine combines realistic tactical styling with modern airgun features and practical semi-automatic operation. Its GEN II upgrades, including the M-LOK handguard, redesigned stock, improved grip angle, flat-blade trigger, folding sights, and low-profile recoil pad, make it a refined version of the original platform.

With its .177 calibre rifled barrel, 30-round rotary magazine, CO₂ power system, and realistic handling, the MPX GEN II is designed for recreational target shooting and responsible airgun practice.

If you are researching the SIG Sauer MPX GEN II, SIG Sauer MPX GEN2 ASP, or a .177 CO₂ tactical air rifle, this model offers a distinctive combination of design, handling, and semi-automatic shooting performance. Always verify local European regulations before purchasing, transporting, or using the rifle.