SIG Sauer Announces The New MCX SPEAR-LT Series



SIG Sauer’s MCX family is the linchpin of the firearms company as militaries and security organizations  move deeper into the 21st Century requiring weapons that have evolved from some of the workhorses of the late 20th Century and into the new millennium such as the AR platform. Indeed, such an investment into the MCX has turned into really big wins such as bagging the New Generation Squad Weapon (NGSW) contract of the U.S. Army.

With such wins with the MCX, the company further expands into the civilian market offering a new MCX design which still utilizes the same old calibers that shooters are familiar with --- the MCX SPEAR-LT Series. Slimmed further to make it lightweight as compared to the MCX Virtus, the MCX SPEAR-LT is  short-stroke gas piston rifle that also allows civilian shooters to use the design that came from the NGSW MCX-SPEAR to shoot with 5.56 NATO, .300 Blackout and 7.62x39mm rounds.

The handguard of the MCX SPEAR-LT is lightened with attachment screws for additional rigidity and it also has a lightened profile barrel with improved accuracy. With the gun equipped with the SIG QD suppressor-ready flash hider it can be easily used suppressed.


The MCX SPEAR-LT Series are available in five variants ranging from a full rifle to more compact SBR and pistol variants, designed to meet the various requirements of shooters.  The .223 and 7.62 x 39 variants are available in 16” & 11.5” barrels and the the .300 model comes with a 9” barrel. SIG Sauer developed a new latch system the 7.62x39 MCX-SPEAR LT so it can handle the many different varieties of 7.62 caliber ammunition and still be able to maintain reliability and provide smooth shooting.






Other features are the SIG Flatblade Match Trigger, fully ambidextrous controls, interchangeable Nitrided barrels, anodized Coyote FDE color finish, easy to operate folding stock, and ambi-bolt catch/release.

The MCX SPEAR-LT Series is now available at authorized sellers with an MSRP of US $2,729.99. Press release below:

The Evolution of the SIG SAUER MCX: Introducing the MCX-SPEAR-LT

NEWINGTON, N.H., (September 19, 2022) – SIG SAUER is pleased to announce the evolution of the most advanced and tested rifle platform in the world with the introduction of the MCX-SPEAR-LT.  Built off the foundation of the MCX Virtus the third generation of the MCX combines all the extensive testing, continued product development, and customer/special operations feedback to become the MCX-SPEAR-LT.  

“The first generation of the MCX platform was designed to be an AR-15 style platform with added modularity.  The second generation of the MCX, the MCX Virtus, was purpose-built for rugged durability and brought unprecedented modularity.  Now comes the MCX-SPEAR-LT, which incorporates the best of both generations and is the culmination of the latest research, development, and innovation in the MCX platform,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, Commercial Sales, SIG SAUER, Inc.  “The lightened handguard has the expected rigidity and durability of the MCX, the lower is a familiar SDI, M400-style lower and ambi-bolt catch and release that is designed to fit the legacy VIRTUS uppers for more versatility.  The MCX-SPEAR-LT will accept AR-15 style triggers, in addition to the legacy triggers for even more flexibility in the MCX platform.  With the MCX-SPEAR_LT also comes the long-awaited addition of the 7.62×39 caliber to the MCX family bringing even more modularity to a platform that simply can’t be matched.  The evolution continues and the MCX-SPEAR-LT has raised the bar for modular weapons technology.”

The MCX-SPEAR-LT rifle is an aluminum frame rifle with a gas piston operating system featuring a lightweight ergonomic handguard, push-button folding stock with cheek-rest, and a cold hammer forged carbon steel barrel available in 9-inch (300BLK), 11.5-inch (7.62×39 & 5.56), and 16-inch (7.62×39 & 5.56) lengths.  The rifle offers fully ambidextrous controls including bolt catch and release, a SIG QD suppressor-ready flash hider optimized for SIG SAUER QD suppressors, a SIG flatblade match trigger, comes optics ready and can be easily paired with a SIG SAUER Electro-Optics ROMEO8 or TANGO6T, and is finished in a Coyote Anodized finish.  The MCX-SPEAR-LT is available is 300BLK, 556 NATO, 762×39 calibers.


Caliber: 300BLK
Barrel Length: 9 inch

Caliber: 556 NATO
Barrel Length: 11.5 inch

Caliber: 762×39
Barrel Length: 11.5 inch

Caliber: 556 NATO
Barrel Length: 16 inch

Caliber: 762×39
Barrel Length: 16 inch

*For additional specs including weight, overall length, width, and height by model visit the product page at sigsauer.com.

The MCX-SPEAR-LT is now shipping and available at retailers.  To learn more about the MCX-SPEAR-LT or watch the product video visit sigsauer.com.

The Latest News


Feature Story

Airsoft Guns and Gear Reviews