SIG SAUER MCX-SPEAR 7.62×51 NATO 13-Inch Pistol

SIG SAUER MCX-SPEAR 7.62×51 NATO 13-Inch Pistol Overview

This SIG SAUER MCX-SPEAR is the coyote-finished 13-inch pistol configuration chambered in 7.62×51 NATO. The exact product is identified by manufacturer part number PSPEAR76213B and UPC 798681681372. It combines the large-frame MCX-SPEAR operating system with a compact barrel assembly, full ambidextrous controls, and one 20-round magazine. This configuration is supplied without a shoulder stock or brace.

The commercial MCX-SPEAR platform is derived from the architecture SIG developed for the U.S. Army’s XM7 program. It brings large-frame capability into the modular MCX family with multiple charging options, a piston-driven operating system, and an aluminum receiver set. The 13-inch format creates a compact platform while retaining the power and reach of the 7.62×51 NATO cartridge.

13-Inch Barrel and Adjustable Gas System

The black 13-inch barrel uses a 1:10-inch twist rate and a 5/8×24 muzzle thread pattern. A SIG SLX/SLH quick-detach flash hider is installed at the muzzle, providing a factory interface for compatible SIG suppressor systems where lawful. Any muzzle-device or suppressor installation should follow the applicable manufacturer instructions and legal requirements.

A two-position adjustable gas valve lets the operating system be configured for supported conditions and equipment. The short-stroke piston system keeps the action mechanically separate from the direct gas path used by conventional AR-pattern rifles. Follow the owner’s manual when selecting a gas setting, servicing the piston assembly, or changing components.

Dual Charging Handles and Ambidextrous Controls

The MCX-SPEAR provides both a rear charging handle and a non-reciprocating side charging handle. This dual arrangement gives the user more than one way to operate the action while keeping the side handle stationary during firing. The lower receiver incorporates ambidextrous fire controls, including the safety, bolt catch and release, and magazine release.

SIG’s two-stage Matchlite Duo trigger supplies a defined first stage followed by a consistent break. The pistol uses a textured polymer grip and an aluminum receiver finished in coyote. Integrated quick-detach sling points provide attachment options for compatible slings, subject to the user’s selected setup.

Free-Floating M-LOK Handguard

A lightened aluminum M-LOK handguard surrounds the barrel and gas system. Its free-floating design avoids direct handguard pressure on the barrel, while M-LOK slots provide mounting space for compatible accessories. A continuous top Picatinny rail runs along the upper receiver and handguard for an optic and other appropriately mounted equipment.

This model does not include iron sights, so an appropriate optic or sighting system must be selected separately. Confirm that all mounts are compatible with the Picatinny rail and are rated for the recoil of a 7.62×51 platform. The factory coyote finish creates a consistent appearance across the receiver and handguard.

Compact Large-Frame Configuration

With no stock or brace included, the protected catalog configuration measures approximately 24.5 inches overall and weighs about 9.2 pounds. The compact length makes storage and transport more manageable than the 16-inch rifle configuration, while the full-width receiver, substantial barrel assembly, and piston operating system retain the solid feel expected from the MCX-SPEAR family.

The pistol accepts a detachable 20-round magazine and has a listed 20+1 capacity. One 20-round magazine is included. Magazine availability and permissible capacity vary by jurisdiction, so confirm the receiving dealer’s requirements before ordering.

Key Specifications

• Manufacturer part number: PSPEAR76213B
• UPC: 798681681372
• Model: MCX-SPEAR pistol
• Caliber: 7.62×51 NATO / .308-class platform
• Action: Semi-automatic, piston operated
• Barrel: 13 inches, black finish
• Twist rate: 1:10 inches
• Muzzle thread: 5/8×24
• Muzzle device: SIG SLX/SLH QD flash hider
• Capacity: 20+1 rounds
• Magazine: One 20-round magazine
• Controls: Fully ambidextrous
• Charging system: Rear and non-reciprocating side charging handles
• Trigger: Two-stage Matchlite Duo
• Handguard: Free-floating aluminum M-LOK
• Sights: Not included; full-length Picatinny rail
• Overall length: Approximately 24.5 inches
• Finish: Coyote receiver and handguard
• Stock or brace: Not included

Modular MCX-SPEAR Capability

The PSPEAR76213B configuration is designed for buyers seeking a compact 7.62×51 MCX-SPEAR with factory muzzle hardware, adjustable gas operation, and fully ambidextrous controls. Because firearm classification and accessory rules may depend on the final configuration and jurisdiction, consult the receiving licensed dealer before adding a stock, brace, vertical grip, suppressor, or other regulated component. Use only compatible ammunition and accessories, follow the SIG SAUER manual, and observe all safe-handling and storage practices.