SIG SAUER Introduces MCX VIRTUS: Advanced Modularity and Design Results in More than 500 Configurations
SIG SAUER Introduces MCX VIRTUS: Advanced Modularity and Design Results in More than 500 Configurations

Newington, N.H.-( SIG SAUER, Inc., The Complete Systems Provider, unveils the MCX VIRTUS in 5.56 NATO and 300 BLK, a platform engineered and built to be the most adaptive, accurate, and longest-lasting rifle available.

The original SIG MCX rifle, conceived for the demands of the Special Operations community, quickly became known in the firearms world because of its durable performance and end-user configurability. To enhance the design, SIG received feedback from Special Operations units worldwide, making the most advanced rifle ever built even better. The result is the MCX VIRTUS.

“SIG has supplied firearms to meet the unique demands of specialized units for decades,” said Ron Cohen, President and CEO of SIG SAUER. “Similar to the P320 pistol, the MCX VIRTUS was created to be the ultimate modular platform, a design that will change the demands of the modern rifle for years to come.”

In ancient Rome, “Virtus” stood for virtue, courage, bravery, and excellence. The MCX VIRTUS embodies the spirit of the professional users who have depended on and continue to rely on the MCX in the field. The added features and enhancements of the MCX VIRTUS include increasing accuracy, delivering additional modularity, and providing a service life of more than 20,000 rounds, all without a single part replacement. Between barrels, stocks, handguards, and colors, the MCX VIRTUS can be configured in over 500 different ways for any possible need or mission.

Available in Patrol, Pistol, and SBR variants, in Stealth Gray or FDE color, the MCX VIRTUS utilizes the proven SIG SAUER short-stroke piston system and unique internal recoil system that eliminates the M4-style buffer tube. The result is a compact, light-recoiling platform that can be configured for any task.

Cold hammer-forged barrels, available in 9”, 11.5”, and 16” lengths, feature an advanced interchangeable design and can be exchanged at the operator level. To increase accuracy, the barrels are of a heavier contour profile. Also assisting with accuracy is the new SIG Matchlite Duo trigger, a two-stage unit that provides the shooter with a crisp, clean feel. A new tapered bolt lug design results in smoother cycling and extends the bolt life. Capping off the upgrades are eight (8) new free-floating M-LOK handguards available in standard and suppressor-ready configurations.

Built by SIG for professionals and shooters of any level, the MCX VIRTUS is ready for any mission.

For more information about the SIG MCX VIRTUS, please visit

Read Related: SIG MCX Virtus Pistol ~ Is It Really Worth $2,000? ~ VIDEO

About SIG SAUER, Inc.

SIG SAUER, Inc. is The Complete Systems Provider, leading the industry in American innovation, ingenuity, and manufacturing. SIG SAUER brings a dedication to superior quality, ultimate reliability, and unmatched performance that has made it the brand of choice among many of the world’s elite military, government, and law enforcement units, as well as responsible citizens. SIG SAUER offers various products to meet mission parameters, including handguns, rifles, ammunition, electro-optics, suppressors, ASP (Advanced Sport Pellet) airguns, and training. The largest member of a worldwide business group of firearms manufacturers, SIG SAUER GmbH & Co. KG in Germany and Swiss Arms AG in Switzerland, SIG SAUER is an ISO 9001: 2008 certified company with more than 1,600 employees. For more information on SIG SAUER, any of its products, or the SIG SAUER AcademySM, please visit

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This “seems like a wonderful platform and I agree, modularity is important. But I remind you all of the 556 and 556XI of which were supposed to be modular as well. The “quick change” barrels never saw production but the price tags did, about $450-500 per barreled caliber. Gas blocks being pinned required the use of an entire assembly. Penicil barrels with unusual profiles of .713 taper pinned gas blocks ensure a pain in the ass. I found someone to custom cut a barrel but due to the one piece gas blocks of pencil barrel circumference, it’s a lot of… Read more »