SIG SAUER M18 Massachusetts-Compliant 9mm Pistol

SIG SAUER M18 Massachusetts-Compliant 9mm Pistol

The SIG SAUER M18 Massachusetts-compliant pistol brings the compact M18 service-pistol format to buyers who require a factory 10-round configuration. This exact model is identified by manufacturer part number M18-9-CSS-MS-MA and UPC 798681730193. It combines a 3.9-inch barrel, Carry-size coyote grip module, coyote PVD stainless-steel slide, SIGLITE night sights, ambidextrous manual safety, and three 10-round steel magazines.

This is a distinct state-compliant package, not simply a standard-capacity M18 with different magazines added later. SIG SAUER lists the model specifically for Massachusetts and includes it on the Massachusetts target roster. Its exact MPN separates it from the M18-9-CSS-MS standard-capacity package and the broader M18-9-CSS-MS-10 configuration offered for several other restricted-capacity states.

Compact M18 Carry Configuration

The M18 uses a Carry-size layout with a 3.9-inch carbon-steel barrel and a compact-length slide. It measures approximately 7.2 inches overall, 5.5 inches high, and 1.5 inches wide. SIG SAUER lists its weight with a magazine at about 28.1 ounces. These dimensions make the pistol shorter than the full-size M17 while retaining a service-size grip and familiar P320 controls.

The standard coyote Carry medium grip module provides enough surface area for a complete firing-hand purchase. Its polymer construction surrounds the serialized stainless-steel fire-control unit used by the P320 family. An integrated M1913 rail at the front of the frame accepts compatible lights and other properly sized accessories.

MHS-Pattern Optics-Ready Slide

The stainless-steel slide is treated with a coyote M17 PVD finish that matches the grip module’s military-inspired color. Its MHS configuration uses a single-screw sight-plate assembly and an optics interface listed by SIG SAUER for the DeltaPoint Pro and ROMEO-M17 pattern. Because optic mounting requirements can change between sight models and hardware generations, buyers should confirm the exact plate, screws, and installation instructions before mounting an electronic sight.

SIGLITE night sights are installed from the factory. The front sight and night-sight rear plate give the pistol visible aiming references in reduced light while maintaining a conventional sight picture in daytime conditions. The removable rear plate lets the owner keep the factory iron-sight system or configure the slide for a compatible red-dot optic.

Striker-Fired Action and Ambidextrous Safety

The M18 uses a striker-fired action with a standard curved trigger. An ambidextrous manual thumb safety can be operated from either side of the frame, supporting right- or left-handed use. SIG SAUER also equips the M18 with a shielded ambidextrous slide-catch lever, reinforcing the pistol’s service-oriented control layout.

The manual safety, compact upper assembly, full-height grip, and night sights create a familiar configuration for training, range use, home defense, or collection. Its P320-based modular architecture also gives trained armorers and owners access to a broad family of compatible factory components, although any parts changes should follow SIG SAUER instructions and applicable laws.

Three 10-Round Magazines Included

This Massachusetts-compliant package ships with three 10-round steel magazines. The pistol therefore provides a 10+1 capacity when loaded in accordance with the owner’s manual and applicable law. Including three magazines gives the buyer a useful range or training setup without requiring immediate additional magazine purchases.

Key Specifications

• Manufacturer part number: M18-9-CSS-MS-MA
• UPC: 798681730193
• Model: M18, Massachusetts-compliant configuration
• Caliber: 9mm Luger
• Action: Striker fired, semi-automatic
• Barrel: 3.9-inch carbon steel
• Frame size: Carry
• Grip: Standard coyote Carry medium polymer module
• Slide: Stainless steel with coyote M17 PVD finish
• Optic ready: Yes, M18 MHS-pattern slide configuration
• Sights: SIGLITE front and night-sight rear plate
• Safety: Ambidextrous manual thumb safety
• Accessory rail: M1913
• Capacity: 10+1
• Included magazines: Three 10-round steel magazines
• Approximate dimensions: 7.2 inches long, 1.5 inches wide, and 5.5 inches high
• Approximate weight: 28.1 ounces with magazine

A Factory Compliance-Focused M18 Package

The M18-9-CSS-MS-MA is intended for customers who want the coyote M18 appearance, compact service-pistol dimensions, manual safety, night sights, and optic capability in a factory Massachusetts-compliant configuration. Its three-magazine package and clearly defined model number make it easier to verify exactly what is included before purchase.

State and local firearm rules can change and may include transfer, roster, magazine, storage, or possession requirements beyond the factory configuration. Confirm current eligibility with your transferring dealer and relevant authorities before ordering, and follow all safe-handling, transport, and storage requirements.