SIG Sauer Releases A Commercial Variant Of The NGSW MCX-SPEAR



SIG Sauer's entries the U.S. Army’s Next Generation Squad Weapon (NGSW) program, the SIG MCX-Spear rifle (NGSW-R) and SIG MG 6.8 belt-fed machine gun (NGSW-AR), are the finalists together with Lone Star Future Weapons/True Velocity with their RM-277R bullpup rifle and RM-277AR machine gun. But even before the U.S. Army gets to select the replacements of the M4 and M249, private individuals in the U.S. may get to own the SIG MCX Spear Rifle as SIG Sauer announces that a variant is now commercially available.

While the SIG MCX-Spear for the NGSW program is chambered in 6.8mm round (6.8x43mm), the commercial variant will be using the .277 Fury (6.8x51mm), the 6.5 Creedmoor and 7.62 NATO via barrel changes.

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The design of the SIG MCX-SPEAR is influenced by the inputs of soldiers who have been testing the prototypes entered for the NGSW program, making it ideal rifle for those looking for a new generation or a rifle made for the 21st Century.

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First Production Run Special Edition is now available at select dealers with an MSRP of US$7,999.00.

Press release from SIG Sauer below:

SIG SAUER Launches Commercial Variant of U.S. Army Next Generation Squad Weapon (NGSW) MCX-Spear and 277 SIG FURY Ammunition

NEWINGTON, N.H., (January 13, 2022) – SIG SAUER is proud to announce the official expansion of the MCX series of rifles with the new MCX-SPEAR chambered in 277 SIG FURY.  The MCX-SPEAR was developed with direct input from U.S. warfighters to provide more power, distance, and accuracy to replace the current M4 rifle platform.  The MCX-SPEAR is now the most innovative and advanced AR platform in the world.

“This is a rare opportunity for passionate consumers to own a piece of history,” began Ron Cohen, President & CEO, SIG SAUER, Inc.  “This first production run MCX-SPEAR, and all of the revolutionary technology behind its development, is being offered to the commercial market in a configuration that is a near match to our NGSW-R submission.  Further, this is the only rifle submission to the program that is designed and engineered in the United States by a company with the manufacturing scale and proven adherence to military-grade quality requirements – which is a tremendous source of pride for everyone at SIG SAUER.”

The MCX-SPEAR is an adaptable multi-caliber rifle (277 SIG FURY, 6.5 Creedmoor, 7.62 NATO, with barrel change) featuring rear and side non-reciprocating charging handles, 6-position folding stock,ambidextrous fire control, bolt-catch, and mag release, 2-stage match trigger, 2-position adjustable gas piston, a lightened free-float M-LOK™ handguard, a full-length picatinny rail, and ships with (2) 20-round magazines.

“The revolutionary SIG FURY ammunition is the most technically advanced leap in smalls arms ammunition in over 150 years, this turns your intermediate rifle platform into magnum performance without the added weight or length while still using 20–round magazines,” added Cohen.

The 277 SIG FURY ammunition is the commercial variant of the 6.8 x 51 hybrid military round available in the hybrid case technology submitted to the U.S. Army NGSW program.  Also available is a 277 SIG FURY FMJ traditional cartridge round available.

“The final component of this special-edition offering includes the SLX Suppressor.  The design of the SLX suppressor isoptimized to dramatically reduce harmful toxic backflow andfeatures our patented QD attach/detach system making installation of the suppressor a game-changing level of ease,” said Cohen.  

The SIG SAUER SLX Series of suppressors are designed to drastically reduce toxic fume inhalation by the end-user and sound reduction and are available commercially for 5.56, 7.62 NATO, and 277 SIG FURY calibers.  The SLX suppressors feature a monolithic core construction in Inconel, an internal multi-flow path to exhaust gases at a higher rate resulting in lower toxic fume inhalation, a sound reducing baffle design, a flash reducing end cap, and are available with either the new Clutch-Lock QD mounting system for easy install and removal that offers an intuitive tactile locking ring with infinite radial locking positions, or direct thread.


  • Caliber: 277 SIG FURY / 6.8 x 51
  • Overall length: 34.1 inches
  • Overall height: 7.97 inches
  • Overall width: 2.98 inches
  • Barrel length: 13 inches
  • Barrel Twist: 1:7
  • Weight (w/magazine): 8.38 lbs.

SIG FURY Ammunition:

277 Sig FURY 135 Gr FMJ Bullet – Standard Brass Case
277 Sig FURY Elite Series Accubond® 150 Gr Nosler AccubondBullet – Hybrid Brass/Stainless Steel Case

SLX Suppressor:

  • Finish: High Temp Cerakote
  • Core Material: Inconel
  • Diameter: 1.67in.
  • Overall Length: 5.24in./7.49in.
  • Weight: 8.8oz -19.4oz.
  • Attachment Type: Clutch-Lock QD™ or Direct Thread

The MCX-SPEAR, 277 SIG FURY Hybrid Ammunition, and SLX Series Suppressors are now shipping and available at select commercial retailers.  To learn more about the SIG SAUER submission to the U.S. Army’s Next Generation Squad Weapons Program or the products visit sigsauer.com.

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