SIG SAUER MCX-SPEAR 7.62 NATO 16-Inch Rifle

SIG SAUER MCX-SPEAR 7.62 NATO Rifle

The SIG SAUER MCX-SPEAR in 7.62x51mm NATO brings the full-power SPEAR platform to a commercial 16-inch rifle configuration. This exact model, manufacturer part number RSPEAR-762-16B, pairs a coyote-finished receiver and folding, telescoping stock with a black 16-inch barrel, free-float aluminum M-LOK handguard, and full-length optic rail. It is supplied with one 20-round magazine and is built around the controls and charging options that distinguish the MCX-SPEAR family.

SIG SAUER identifies the MCX-SPEAR as the civilian version of the U.S. Army’s XM7 rifle. The design is intended for shooters who want a modern, piston-operated platform chambered for the widely established 7.62 NATO/.308 Win class of ammunition. Its layout combines familiar semiautomatic-rifle ergonomics with a folding stock, ambidextrous operating controls, and a compact folded profile that is not dependent on a conventional buffer tube.

Exact Variant Highlights

• Caliber: 7.62x51mm NATO / .308 Win
• Barrel: 16 inches, black finish, 1:10-inch twist
• Muzzle thread: 5/8×24 with SIG suppressor-ready QD flash hider
• Capacity: 20+1; one 20-round magazine included
• Stock: folding, six-position telescoping configuration
• Handguard: free-float aluminum M-LOK with continuous top rail
• Controls: fully ambidextrous with rear and side charging handles
• Finish: coyote receiver and furniture with black barrel
• Overall length: approximately 28 to 38.3 inches, depending on stock position
• Manufacturer identifiers: MPN RSPEAR-762-16B; UPC 798681674022

Purpose-Built Operating System

The MCX-SPEAR uses a short-stroke gas-piston operating system with a two-position adjustable gas valve. By keeping the recoil assembly within the upper receiver, the design allows the stock to fold without preventing the action from cycling. The result is a rifle that can be made substantially shorter for transport or storage while retaining a full-length 16-inch barrel when deployed.

A 1:10-inch twist is a versatile choice for common 7.62 NATO and .308 Winchester projectile weights. The 5/8×24 muzzle interface is a familiar standard for this caliber, while the factory SIG SLX/SLH suppressor-ready QD flash hider provides a compatible mounting point for appropriate SIG muzzle devices and suppressors. Always confirm ammunition, muzzle-device, and suppressor compatibility with the applicable manufacturer documentation before use.

Ambidextrous Controls and Optic-Ready Layout

The rifle is configured for efficient access from either shoulder. Ambidextrous controls include the safety, magazine release, and bolt catch/release, and the platform provides both a conventional rear charging handle and a side charging handle. That combination gives the operator flexibility in how the action is manipulated around an optic or other mounted equipment.

The MCX-SPEAR ships without iron sights, leaving the continuous top rail ready for the user’s preferred optic and mounting solution. M-LOK slots along the free-float handguard provide attachment space for compatible accessories while keeping the barrel isolated from direct handguard pressure. The coyote anodized receiver and matching furniture create the distinctive SPEAR appearance, contrasted by the black barrel and operating components.

Adjustable Stock and Full-Power Format

The folding, six-position telescoping stock accommodates different body sizes, shooting positions, and equipment setups. Extended, the rifle measures approximately 38.3 inches; folded and collapsed, it reaches a much shorter storage profile. Unloaded weight is approximately 9.2 pounds, giving the rifle the substance expected from a 7.62 NATO semiautomatic while retaining the handling advantages of the MCX architecture.

This model is a strong fit for buyers seeking a premium, optic-ready 7.62 rifle with modern controls, a configurable stock, and factory support from SIG SAUER. The box includes the rifle and one 20-round magazine. Availability, magazine capacity, and transfer requirements vary by jurisdiction; confirm all federal, state, and local requirements before ordering.

What This Configuration Includes

This is the 16-inch rifle version of the MCX-SPEAR, not the 13-inch pistol or short-barreled-rifle configuration. The factory package centers on the coyote 7.62 NATO rifle and one 20-round magazine; an optic and iron sights are not included. Its combination of a standard rifle-length barrel, folding stock, adjustable length of pull, and SR-25-pattern magazine format makes the exact model easy to identify when comparing SPEAR variants, accessories, and compliant magazine options.