DETAILS
Brand: Sig Sauer
Model: P320 M18X
Caliber: 9mm
Capacity: 21rd
Barrel Length: 3.9″
OAL: 7.2″
Frame Size: Carry
Frame Material: Stainless Steel
Barrel Material: Carbon Steel
Finish: Coyote PVD
Accessory Rail: M1913
Trigger: Standard
Weight: 28.1 oz.
Optic: ROMEO-M17 Red Dot
The SIG SAUER P320 M18 9mm 3.9” 21RDS Pistol with ROMEO X M17 Optic, Coyote – Model M18X-9-RX is a high-performance sidearm engineered for reliability, precision, and tactical excellence. Inspired by the official U.S. military service pistol, this civilian variant of the renowned M18 offers the same uncompromising performance and rugged design trusted by armed forces across the globe. Enhanced with the cutting-edge ROMEO X M17 red dot optic, the M18X-9-RX is ready for both defensive and competitive shooting applications straight out of the box.
Whether you’re a seasoned shooter, law enforcement officer, tactical operator, or civilian enthusiast, this full-featured 9mm pistol delivers unmatched versatility and firepower. Packed with 21-round extended capacity, ambidextrous controls, modular design, and optic-ready configuration, the M18X-9-RX in its striking coyote-tan finish is an elite firearm built to perform in any environment.
KEY FEATURES OF THE SIG SAUER P320 M18X-9-RX 9MM PISTOL:
1. Official U.S. Military Design
The SIG P320 M18 is the civilian version of the M18 modular handgun system currently issued to the U.S. Marine Corps, Navy, Air Force, and Space Force. This pistol maintains nearly all the military-grade specifications, offering civilians access to a truly battle-tested platform.
2. Caliber and Barrel
Chambered in 9mm Luger, this pistol features a 3.9-inch carbon steel barrel, providing an optimal balance between concealability and accuracy. The short barrel is ideal for duty carry, tactical use, or concealed carry, while still delivering reliable performance and consistent ballistic output.
3. ROMEO X M17 Red Dot Optic
One of the standout features of this model is the pre-installed SIG ROMEO X M17 optic, designed specifically for P320 pistols. With high-efficiency red dot visibility and multiple brightness settings, the ROMEO X M17 provides lightning-fast target acquisition and improved shooting confidence. Its ultra-low profile allows for co-witnessing with standard iron sights, while maintaining superior shock and weather resistance.
4. Extended 21-Round Magazine Capacity
The M18X-9-RX comes standard with a 21-round steel magazine, offering increased firepower without compromising comfort or handling. Whether you’re at the range, carrying for defense, or preparing for duty use, this extended magazine ensures fewer reloads and higher round count on hand.
5. Modular Fire Control Unit (FCU)
The serialized fire control unit (FCU) of the P320 platform is fully modular, allowing users to swap out grip modules, slides, barrels, and calibers with ease. This enables complete customization and adaptability depending on mission needs or personal preference—without having to purchase a whole new firearm.
6. Ambidextrous Controls
Built with ambidextrous manual safety and reversible magazine release, the M18X-9-RX accommodates both right- and left-handed shooters. Its intuitive ergonomics support fast manipulation, tactical reloads, and safe operation in high-stress scenarios.
7. Coyote-Tan Finish
The distinctive coyote-tan PVD slide and polymer grip module not only mimic the military-issue appearance but also enhance durability by resisting wear, corrosion, and harsh environmental conditions. This unique finish sets the M18 apart from other striker-fired pistols on the market.
8. Optic-Ready Slide with Night Sights
Even with the ROMEO X mounted, the pistol retains SIGLITE night sights, offering optimal visibility in low-light conditions. These night sights are suppressor-height, allowing for full co-witnessing with the optic and providing a critical backup aiming solution.
9. Striker-Fired Simplicity
The P320 M18X-9-RX uses a striker-fired operating system with a clean, crisp trigger pull. With no external hammer to snag, it’s ideal for both open carry and concealed carry. The consistent trigger feel improves shot accuracy and overall control, especially under stress.
TECHNICAL SPECIFICATIONS:
-
Model: M18X-9-RX
-
Caliber: 9mm Luger
-
Barrel Length: 3.9 inches
-
Overall Length: 7.2 inches
-
Height: 5.5 inches
-
Width: 1.6 inches
-
Weight (with magazine): Approx. 28.1 oz
-
Magazine Capacity: 21 rounds
-
Optic: ROMEO X M17 Red Dot Sight
-
Frame Material: Polymer
-
Slide Material: Stainless Steel (PVD coated)
-
Finish: Coyote-Tan
-
Safety: Manual Thumb Safety
-
Sights: SIGLITE Night Sights / Optic Ready
-
Trigger: Striker-Fired, Clean Break
-
Accessory Rail: MIL-STD-1913 Picatinny Rail
WHO IS THIS PISTOL FOR?
-
Law Enforcement & Military Personnel: Transition smoothly between duty and civilian life with a pistol that mirrors your service weapon.
-
Concealed Carriers: The compact frame and shorter barrel make this sidearm ideal for concealed carry while still offering full-size magazine capacity.
-
Competitive Shooters: The ROMEO X optic and crisp trigger response make this firearm perfect for fast-paced shooting sports.
-
Tactical Professionals: The modularity, high capacity, and reliability make it a top-tier choice for tactical applications and home defense.
-
Everyday Enthusiasts: Whether for range use, self-defense, or collection, the M18X-9-RX is a feature-rich handgun that’s fun to shoot and built to last.
WHY CHOOSE THE SIG SAUER P320 M18X-9-RX?
The SIG SAUER P320 M18X-9-RX with ROMEO X M17 Optic offers unmatched value in today’s striker-fired handgun market. With a military pedigree, customizable platform, and integrated optic, it’s ready for action out of the box—no upgrades needed. You get the benefits of a combat-proven firearm, high magazine capacity, ambidextrous controls, and optic-ready readiness in a single package.
Backed by SIG SAUER’s legendary engineering and trusted by professionals worldwide, the M18X-9-RX represents a pinnacle in modern pistol design. Whether you’re defending your home, qualifying on the range, or exploring the limits of your tactical potential, this handgun ensures you do it with power, precision, and confidence.
-
SIG SAUER P320 M18
-
M18X-9-RX
-
SIG M18 pistol with ROMEO X optic
-
SIG P320 military pistol
-
9mm striker-fired handgun
-
Best optics-ready pistol 2025
-
21-round 9mm pistol
-
SIG M18 civilian version
-
Modular 9mm pistol
-
Coyote PVD slide handgun
-
Concealed carry pistol with red dot
SIG ROMEO X M17 optic
The SIG SAUER P320 M18 9mm 3.9” 21RDS Pistol with ROMEO X M17 Optic, Coyote – Model M18X-9-RX is a high-performance sidearm engineered for reliability, precision, and tactical excellence. Inspired by the official U.S. military service pistol, this civilian variant of the renowned M18 offers the same uncompromising performance and rugged design trusted by armed forces across the globe. Enhanced with the cutting-edge ROMEO X M17 red dot optic, the M18X-9-RX is ready for both defensive and competitive shooting applications straight out of the box.
Whether you’re a seasoned shooter, law enforcement officer, tactical operator, or civilian enthusiast, this full-featured 9mm pistol delivers unmatched versatility and firepower. Packed with 21-round extended capacity, ambidextrous controls, modular design, and optic-ready configuration, the M18X-9-RX in its striking coyote-tan finish is an elite firearm built to perform in any environment.
KEY FEATURES OF THE SIG SAUER P320 M18X-9-RX 9MM PISTOL:
1. Official U.S. Military Design
The SIG P320 M18 is the civilian version of the M18 modular handgun system currently issued to the U.S. Marine Corps, Navy, Air Force, and Space Force. This pistol maintains nearly all the military-grade specifications, offering civilians access to a truly battle-tested platform.
2. Caliber and Barrel
Chambered in 9mm Luger, this pistol features a 3.9-inch carbon steel barrel, providing an optimal balance between concealability and accuracy. The short barrel is ideal for duty carry, tactical use, or concealed carry, while still delivering reliable performance and consistent ballistic output.
3. ROMEO X M17 Red Dot Optic
One of the standout features of this model is the pre-installed SIG ROMEO X M17 optic, designed specifically for P320 pistols. With high-efficiency red dot visibility and multiple brightness settings, the ROMEO X M17 provides lightning-fast target acquisition and improved shooting confidence. Its ultra-low profile allows for co-witnessing with standard iron sights, while maintaining superior shock and weather resistance.
4. Extended 21-Round Magazine Capacity
The M18X-9-RX comes standard with a 21-round steel magazine, offering increased firepower without compromising comfort or handling. Whether you’re at the range, carrying for defense, or preparing for duty use, this extended magazine ensures fewer reloads and higher round count on hand.
5. Modular Fire Control Unit (FCU)
The serialized fire control unit (FCU) of the P320 platform is fully modular, allowing users to swap out grip modules, slides, barrels, and calibers with ease. This enables complete customization and adaptability depending on mission needs or personal preference—without having to purchase a whole new firearm.
6. Ambidextrous Controls
Built with ambidextrous manual safety and reversible magazine release, the M18X-9-RX accommodates both right- and left-handed shooters. Its intuitive ergonomics support fast manipulation, tactical reloads, and safe operation in high-stress scenarios.
7. Coyote-Tan Finish
The distinctive coyote-tan PVD slide and polymer grip module not only mimic the military-issue appearance but also enhance durability by resisting wear, corrosion, and harsh environmental conditions. This unique finish sets the M18 apart from other striker-fired pistols on the market.
8. Optic-Ready Slide with Night Sights
Even with the ROMEO X mounted, the pistol retains SIGLITE night sights, offering optimal visibility in low-light conditions. These night sights are suppressor-height, allowing for full co-witnessing with the optic and providing a critical backup aiming solution.
9. Striker-Fired Simplicity
The P320 M18X-9-RX uses a striker-fired operating system with a clean, crisp trigger pull. With no external hammer to snag, it’s ideal for both open carry and concealed carry. The consistent trigger feel improves shot accuracy and overall control, especially under stress.
TECHNICAL SPECIFICATIONS:
-
Model: M18X-9-RX
-
Caliber: 9mm Luger
-
Barrel Length: 3.9 inches
-
Overall Length: 7.2 inches
-
Height: 5.5 inches
-
Width: 1.6 inches
-
Weight (with magazine): Approx. 28.1 oz
-
Magazine Capacity: 21 rounds
-
Optic: ROMEO X M17 Red Dot Sight
-
Frame Material: Polymer
-
Slide Material: Stainless Steel (PVD coated)
-
Finish: Coyote-Tan
-
Safety: Manual Thumb Safety
-
Sights: SIGLITE Night Sights / Optic Ready
-
Trigger: Striker-Fired, Clean Break
-
Accessory Rail: MIL-STD-1913 Picatinny Rail
WHO IS THIS PISTOL FOR?
-
Law Enforcement & Military Personnel: Transition smoothly between duty and civilian life with a pistol that mirrors your service weapon.
-
Concealed Carriers: The compact frame and shorter barrel make this sidearm ideal for concealed carry while still offering full-size magazine capacity.
-
Competitive Shooters: The ROMEO X optic and crisp trigger response make this firearm perfect for fast-paced shooting sports.
-
Tactical Professionals: The modularity, high capacity, and reliability make it a top-tier choice for tactical applications and home defense.
-
Everyday Enthusiasts: Whether for range use, self-defense, or collection, the M18X-9-RX is a feature-rich handgun that’s fun to shoot and built to last.
WHY CHOOSE THE SIG SAUER P320 M18X-9-RX?
The SIG SAUER P320 M18X-9-RX with ROMEO X M17 Optic offers unmatched value in today’s striker-fired handgun market. With a military pedigree, customizable platform, and integrated optic, it’s ready for action out of the box—no upgrades needed. You get the benefits of a combat-proven firearm, high magazine capacity, ambidextrous controls, and optic-ready readiness in a single package.
Backed by SIG SAUER’s legendary engineering and trusted by professionals worldwide, the M18X-9-RX represents a pinnacle in modern pistol design. Whether you’re defending your home, qualifying on the range, or exploring the limits of your tactical potential, this handgun ensures you do it with power, precision, and confidence.
The SIG SAUER P320 M18 9mm 3.9” 21RDS Pistol with ROMEO X M17 Optic, Coyote – Model M18X-9-RX is a high-performance sidearm engineered for reliability, precision, and tactical excellence. Inspired by the official U.S. military service pistol, this civilian variant of the renowned M18 offers the same uncompromising performance and rugged design trusted by armed forces across the globe. Enhanced with the cutting-edge ROMEO X M17 red dot optic, the M18X-9-RX is ready for both defensive and competitive shooting applications straight out of the box.
Whether you’re a seasoned shooter, law enforcement officer, tactical operator, or civilian enthusiast, this full-featured 9mm pistol delivers unmatched versatility and firepower. Packed with 21-round extended capacity, ambidextrous controls, modular design, and optic-ready configuration, the M18X-9-RX in its striking coyote-tan finish is an elite firearm built to perform in any environment.
KEY FEATURES OF THE SIG SAUER P320 M18X-9-RX 9MM PISTOL:
1. Official U.S. Military Design
The SIG P320 M18 is the civilian version of the M18 modular handgun system currently issued to the U.S. Marine Corps, Navy, Air Force, and Space Force. This pistol maintains nearly all the military-grade specifications, offering civilians access to a truly battle-tested platform.
2. Caliber and Barrel
Chambered in 9mm Luger, this pistol features a 3.9-inch carbon steel barrel, providing an optimal balance between concealability and accuracy. The short barrel is ideal for duty carry, tactical use, or concealed carry, while still delivering reliable performance and consistent ballistic output.
3. ROMEO X M17 Red Dot Optic
One of the standout features of this model is the pre-installed SIG ROMEO X M17 optic, designed specifically for P320 pistols. With high-efficiency red dot visibility and multiple brightness settings, the ROMEO X M17 provides lightning-fast target acquisition and improved shooting confidence. Its ultra-low profile allows for co-witnessing with standard iron sights, while maintaining superior shock and weather resistance.
4. Extended 21-Round Magazine Capacity
The M18X-9-RX comes standard with a 21-round steel magazine, offering increased firepower without compromising comfort or handling. Whether you’re at the range, carrying for defense, or preparing for duty use, this extended magazine ensures fewer reloads and higher round count on hand.
5. Modular Fire Control Unit (FCU)
The serialized fire control unit (FCU) of the P320 platform is fully modular, allowing users to swap out grip modules, slides, barrels, and calibers with ease. This enables complete customization and adaptability depending on mission needs or personal preference—without having to purchase a whole new firearm.
6. Ambidextrous Controls
Built with ambidextrous manual safety and reversible magazine release, the M18X-9-RX accommodates both right- and left-handed shooters. Its intuitive ergonomics support fast manipulation, tactical reloads, and safe operation in high-stress scenarios.
7. Coyote-Tan Finish
The distinctive coyote-tan PVD slide and polymer grip module not only mimic the military-issue appearance but also enhance durability by resisting wear, corrosion, and harsh environmental conditions. This unique finish sets the M18 apart from other striker-fired pistols on the market.
8. Optic-Ready Slide with Night Sights
Even with the ROMEO X mounted, the pistol retains SIGLITE night sights, offering optimal visibility in low-light conditions. These night sights are suppressor-height, allowing for full co-witnessing with the optic and providing a critical backup aiming solution.
9. Striker-Fired Simplicity
The P320 M18X-9-RX uses a striker-fired operating system with a clean, crisp trigger pull. With no external hammer to snag, it’s ideal for both open carry and concealed carry. The consistent trigger feel improves shot accuracy and overall control, especially under stress.
SIG SAUER P320 M18
SIG SAUER P320 M18
TECHNICAL SPECIFICATIONS:
-
Model: M18X-9-RX
-
Caliber: 9mm Luger
-
Barrel Length: 3.9 inches
-
Overall Length: 7.2 inches
-
Height: 5.5 inches
-
Width: 1.6 inches
-
Weight (with magazine): Approx. 28.1 oz
-
Magazine Capacity: 21 rounds
-
Optic: ROMEO X M17 Red Dot Sight
-
Frame Material: Polymer
-
Slide Material: Stainless Steel (PVD coated)
-
Finish: Coyote-Tan
-
Safety: Manual Thumb Safety
-
Sights: SIGLITE Night Sights / Optic Ready
-
Trigger: Striker-Fired, Clean Break
-
Accessory Rail: MIL-STD-1913 Picatinny Rail
SIG SAUER P320 M18
SIG SAUER P320 M18
WHO IS THIS PISTOL FOR?
-
Law Enforcement & Military Personnel: Transition smoothly between duty and civilian life with a pistol that mirrors your service weapon.
-
Concealed Carriers: The compact frame and shorter barrel make this sidearm ideal for concealed carry while still offering full-size magazine capacity.
-
Competitive Shooters: The ROMEO X optic and crisp trigger response make this firearm perfect for fast-paced shooting sports.
-
Tactical Professionals: The modularity, high capacity, and reliability make it a top-tier choice for tactical applications and home defense.
-
Everyday Enthusiasts: Whether for range use, self-defense, or collection, the M18X-9-RX is a feature-rich handgun that’s fun to shoot and built to last.
SIG SAUER P320 M18
SIG SAUER P320 M18
WHY CHOOSE THE SIG SAUER P320 M18X-9-RX?
The SIG SAUER P320 M18X-9-RX with ROMEO X M17 Optic offers unmatched value in today’s striker-fired handgun market. With a military pedigree, customizable platform, and integrated optic, it’s ready for action out of the box—no upgrades needed. You get the benefits of a combat-proven firearm, high magazine capacity, ambidextrous controls, and optic-ready readiness in a single package.
SIG SAUER P320 M18
SIG SAUER P320 M18
Backed by SIG SAUER’s legendary engineering and trusted by professionals worldwide, the M18X-9-RX represents a pinnacle in modern pistol design. Whether you’re defending your home, qualifying on the range, or exploring the limits of your tactical potential, this handgun ensures you do it with power, precision, and confidence.
SIG SAUER P320 M18
SIG SAUER P320 M18
-
SIG SAUER P320 M18
-
M18X-9-RX
-
SIG M18 pistol with ROMEO X optic
-
SIG P320 military pistol
-
9mm striker-fired handgun
-
Best optics-ready pistol 2025
-
21-round 9mm pistol
-
SIG M18 civilian version
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Modular 9mm pistol
-
Coyote PVD slide handgun
-
Concealed carry pistol with red dot
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SIG ROMEO X M17 optic
-
Tactical pistol with night sights
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