The Elite Carry Option: Military-Grade Features in a Civilian Package

The SIG WM18-9-MS, modeled after the U.S. Military M18, delivers full-size capabilities in a compact, carry-optimized profile. Offered with the legendary P320 platform, it blends precision reliability with enhanced ergonomics and optics-ready versatility. Perfect for everyday carry, tactical use, or professional applications, this pistol brings military-standard quality to civilian hands.

Key Features

• Caliber & Capacity: Chambered in common 9×19mm with included (1) 17-round + (2) 21-round steel magazines standard out of the box

• Carry-Sized Design: 3.9″ carbon steel barrel grips compact concealability—measures approx. 7.2″ overall and weighing around 28.1 oz with magazine inserted 

• Finish & Aesthetics: Tactical coyote tan PVD-finished slide and grip module mirror military M18 aesthetics

• Optics Ready Slide: Standard MHS slide configuration with Deltapoint Pro and Romeo-M17 footprint compatibility—no milling required for popular red dots

• SIGLITE Night Sights: Front tritium and removable rear plate offer intuitive aiming in low light and quick optic swaps

• Ambidextrous Manual Safety: User-selectable for added functionality and personal preference

• Full Ambi Controls: Include slide catch, magazine release, and manual safety for optimal control by both hands

• Striker-Fired Performance: Crisp curved trigger, consistent pull weight, and signature SIG reliability in a modular P320 package

What’s Included

• SIG WM18-9-MS pistol

• (1) 17-round steel magazine

• (2) 21-round steel magazines

• SIGLITE front sight & removable rear plate

• User manual and safety lock

Why Choose the SIG WM18-9-MS

• Military origins, civilian-legal: Offers the same proven ergonomics and mission-capable standards as issued service pistols.

• High-capacity carry: Compact footprint with unmatched magazine capacity in its class.

• Optic-ready flexibility: Designed for seamless integration with modern sighting systems.

• Ambidextrous and safe: Loaded with features for user preference and shooting performance under stress.

Feature	Specification
Model	SIG WM18-9-MS
Caliber	9×19mm NATO
Barrel Length	3.9 inches
Capacity	17-round magazine included; 2 × extra 21-round mags
Finish	Coyote Tan PVD
Optics Ready	Yes — compatible w/ Romeo-M17 / Deltapoint Pro mount
Sights	Front SIGLITE tritium, removable rear night-sight plate
Manual Safety	Ambidextrous, frame-mounted
Ambidextrous Controls	Slide catch, magazine release
Trigger Type	Striker-fired, curved trigger
Overall Length	Approx. 7.2″ (183mm)
Questions 0 Ask a Question Question Submit Don 2 weeks ago What is the difference between a bolt-action rifle and a semi-automatic rifle? Answers (1) Proven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design. Overall Rating 0.0 / 5.0 (Based on 0 Reviews) Review Stats View All 5 Stars 0 4 Stars 0 3 Stars 0 2 Stars 0 1 Stars 0 Write a Review SORT BY MOST RECENT Most Recent 5 Stars 4 Stars 3 Stars 2 Stars 1 Stars Photos Verified Purchases No Customer Review on this product Product Details PRODUCT DETAILS TECH SPECS: The Elite Carry Option: Military-Grade Features in a Civilian Package The SIG WM18-9-MS, modeled after the U.S. Military M18, delivers full-size capabilities in a compact, carry-optimized profile. Offered with the legendary P320 platform, it blends precision reliability with enhanced ergonomics and optics-ready versatility. Perfect for everyday carry, tactical use, or professional applications, this pistol brings military-standard quality to civilian hands. Key Features Caliber & Capacity: Chambered in common 9×19mm with included (1) 17-round + (2) 21-round steel magazines standard out of the box Carry-Sized Design: 3.9″ carbon steel barrel grips compact concealability—measures approx. 7.2″ overall and weighing around 28.1 oz with magazine inserted  Finish & Aesthetics: Tactical coyote tan PVD-finished slide and grip module mirror military M18 aesthetics Optics Ready Slide: Standard MHS slide configuration with Deltapoint Pro and Romeo-M17 footprint compatibility—no milling required for popular red dots SIGLITE Night Sights: Front tritium and removable rear plate offer intuitive aiming in low light and quick optic swaps Ambidextrous Manual Safety: User-selectable for added functionality and personal preference Full Ambi Controls: Include slide catch, magazine release, and manual safety for optimal control by both hands Striker-Fired Performance: Crisp curved trigger, consistent pull weight, and signature SIG reliability in a modular P320 package What’s Included SIG WM18-9-MS pistol (1) 17-round steel magazine (2) 21-round steel magazines SIGLITE front sight & removable rear plate User manual and safety lock Why Choose the SIG WM18-9-MS Military origins, civilian-legal: Offers the same proven ergonomics and mission-capable standards as issued service pistols. High-capacity carry: Compact footprint with unmatched magazine capacity in its class. Optic-ready flexibility: Designed for seamless integration with modern sighting systems. Ambidextrous and safe: Loaded with features for user preference and shooting performance under stress. Feature Specification Model SIG WM18-9-MS Caliber 9×19mm NATO Barrel Length 3.9 inches Capacity 17-round magazine included; 2 × extra 21-round mags Finish Coyote Tan PVD Optics Ready Yes — compatible w/ Romeo-M17 / Deltapoint Pro mount Sights Front SIGLITE tritium, removable rear night-sight plate Manual Safety Ambidextrous, frame-mounted Ambidextrous Controls Slide catch, magazine release Trigger Type Striker-fired, curved trigger Overall Length Approx. 7.2″ (183mm) Reviews Overall Rating Reviews 0 0.0 / 5.0 (Based on 0 Reviews) Review Stats View All 5 Stars 0 4 Stars 0 3 Stars 0 2 Stars 0 1 Stars 0 Write a Review SORT BY MOST RECENT Most Recent 5 Stars 4 Stars 3 Stars 2 Stars 1 Stars Photos Verified Purchases No Customer Review on this product Questions Questions 0 Ask a Question Question Submit Don 2 weeks ago What is the difference between a bolt-action rifle and a semi-automatic rifle? Answers (1) Proven Arms & Outfitters A bolt-action rifle requires the shooter to manually operate a bolt to load a round, eject the spent casing, and chamber the next round. In contrast, a semi-automatic rifle is designed to automatically eject the spent casing and chamber a new round with each pull of the trigger. Semi-automatic rifles offer faster follow-up shots, while bolt-action rifles are typically more accurate due to their design. We Also Recommend Quick View Sig Sauer P320F TXG PRO Item # SIG W320F-9-BXR3-TXG-PRO $674.00 Quick View Sig Sauer P320 PROFESSIONAL CARRY, X-RAY SIGHTS, 9MM Item # SIG W320CA-9-BXR3-PRO $589.00 Quick View Sig Sauer P365XL ROMEO-X Item # SIG W365XL-9-BXR3P-RXX $779.00 Quick View Sig Sauer P365-FUSE Item # SIG W365F-9-BXR3P $709.00 Quick View Sig Sauer W365 XMACRO ROMEO-X ENCLOSED Item # SIG W365XCA-9-BXR3P-RXE $939.00 Quick View Sig Sauer P211-GT5 Item # SIG W211F-9-GT5 $1,849.00 Modal title × Close Our site is for individuals 18 years of age of older. Are you at least 18 years old? Yes No