First Look: SIG Sauer MCX 6.8x51mm Spear

Now available in the same chambering as the XM-7 NGSW.

by
posted on October 2, 2024
MCX 6.8x51mm Spear

SIG Sauer is now selling a semi-automatic, civilian version of the U.S. military’s rifle, the MCX Spear chambered in a new proprietary cartridge known as the .277 Fury or 6.8x51mm. The new SIG Sauer MCX Spear is based on the XM-7 NGSW (Next Generation Squad Weapon), which combines the traditional layout and design of an AR-10 pattern rifle with some modern tweaks including SIG Sauer’s proprietary semi-automatic, gas-operated piston-driven rifle action. Like its AR-10-pattern ancestors the MCX Spear is composed of upper and lower receivers that join together. The MCX Spear design omits a buffer-tube assembly, so a push-button Magpul SL-M folding stock that folds to the left is standard. The MCX Spear’s lower receiver is also designed with fully ambidextrous controls, and the upper receiver includes a full-length M-Lok freefloat handguard and a 16-inch barrel. Lastly, a SIG Clutch-Lok QD flash hider comes standard as its muzzle device. This flash hider can directly mount SIG Sauer’s NG-68SPEAR-QD monolithic additive design suppressor. Unlike the semi-automatic MCX Spear, these suppressors are identical to the units in service with the US Government 

SIG Sauer’s .277 Fury/6.8x51mm round represents a pivot in rifle ammunition design. The company has arrived with the 6.8X51mm Hybrid Ball cartridge that uses a 113-grain, solid-copper bullet. This rifle cartridge has a steel case-head and brass casing that was designed to pair with the new 6.8X51mm MCX Spear rifle. The bullet from this round has a standard muzzle velocity of 3,200 fps out of the MCX Spear’s 16-inch barrel. The Hybrid Case Technology harnesses the power of the high-pressure rounds to deliver magnum performance in a short action cartridge, resulting in a flatter trajectory and increased energy on target.

To learn more about the new MCX Spear chambered in 6.8x51mm or other products from SIG Sauer, visit sig-sauer.com.

Latest

Smith & Wesson CSX E-Series
Smith & Wesson CSX E-Series

First Look: Smith & Wesson CSX E-Series

Upgraded and improved with an optics-ready slide and interchangeable backstraps.

First Look: Tanfoglio Pugio 1911 Pistol

Inspired by an ancient Roman dagger.

Nevada DPS Selects KGM Suppressors for Patrol Rifles

The KGM R556A2 has an Inconel core and other components made from stainless steel.

Round-Up: Rapid Access Safes for Long Guns

Secure your home defense rifle or shotgun safe but keep it ready to go.

First Look: Franklin Armory AR-Essential Binary Trigger

A less-expensive version of Franklin's binary trigger system.

Interests



Get the best of Shooting Illustrated delivered to your inbox.