Sig Sauer Introduces The New SIG MCX Regulator Rifle

News|Industry News

By Drew Bryant
March 11th, 2024, theloadoutblog.com

The SIG MCX rifle has long been synonymous with SIG’s resurgence in the firearms market, blending the piston-driven system with the modularity and familiarity of the AR platform. Evolving over time, the MCX series has solidified its position as a cornerstone of the SIG brand, culminating in the recent NGSW contract win with the SIG Spear chambered in .277 Fury. Now, SIG SAUER proudly unveils the latest addition to the series: the MCX Regulator.

Built on the MCX platform, the MCX Regulator boasts the Spear-LT upper receiver paired with a newly designed lower, trigger, and stock configuration, transforming it into a versatile ranch rifle. Notable features of the MCX Regulator include a cold hammer-forged carbon steel barrel, a SIG two-stage match trigger, SIG muzzle device, and ambidextrous controls for enhanced adaptability.

The stock of the SIG Regulator showcases Magpul’s SGA Mossberg 500/590 traditional stock in a Gen II NiR FDE Cerakote, offering not only durability but also a reduced IR signature for tactical operations. For further details on the SIG MCX Regulator, refer to the press release below from SIG SAUER.

Press Release

NEWINGTON, N.H., (March 7, 2024) – Built on the legendary MCX platform, SIG SAUER is pleased to introduce the MCX-REGULATOR for an entirely new level of modularity.  This newest addition to the MCX family combines the upper receiver of the MCX SPEAR-LT and gas piston system used by Elite Special Forces worldwide with a newly designed lower receiver, trigger and stock, forever redefining the ranch rifle.

“The heart and soul of this rifle is one of our flagship products – the legendary MCX,” said Tom Taylor, Chief Marketing Officer and Executive Vice President, Commercial Sales, SIG SAUER, Inc.  “This is the first time the DNA of an Elite Special Forces battle platform, flawless function, and a short stroke gas piston system has been specifically designed and visioned for the working rifle.  At SIG we don’t subscribe to the premise that its acceptable to compromise for any purpose, including your working rifle, and this rifle will revolutionize a day at the ranch or however you use your REGULATOR.”  

The MCX-REGULATOR is an aluminum frame rifle with a gas-piston operating system, a Magpul™ SGA Mossberg 500/590 traditional stock in a Gen II NiR FDE Cerakote™ for reduced IR Signature.  The platform features a redesigned lower receiver compatible with all MCX upper receivers, a fully ambidextrous magazine release, safety selector, and bolt catch. The MCX-REGULATOR ships with a two-stage match trigger, a cold hammer-forged carbon steel barrel, a SIG designed muzzle brake, and is available in 7.62×39 and 5.56 calibers.  The MCX-REGULATOR offers a built in Arca Rail for easy tripod mounting and ships with a 10-round magazine.

Additionally, the MCX-REGULATOR is available in with a factory installed mil-spec ROMEO2 optic. The optic features a molded glass aspheric lens with high-performance coatings for superior light transmittance and zero distortion, D.A.R.C. (Dark Adaptive Reticles and Coatings) technology to provide ideal reticle brightness and target clarity during the day or under night vision, MOTAC™ (motion-activated illumination system) automatically turns the optic off when not in use, and automatically turns it back on when it detects motion, and MAGNETAC™ (Magnetic Activation) automatically turns the optic off when holstered in a compatible holster, and on when drawn. The sight has a 7075-aluminum housing and comes with a full shroud installed to fully enclosed and seal the sight. A spring-loaded side battery tray with push-button release allows a battery change without the need to remove the optic from the firearm.

Product Specifications:

MCX-REGULATOR (5.56):
Caliber: 5.56
Overall Length: 39.1 in.
Overall Height: 5 in.
Overall Width: 2.4 in.
Barrel Length: 16 in.
Barrel Twist: 1:7 in.
Weight w/magazine: 7.9 lbs.

MCX-REGULATOR (7.62×39):
Caliber: 7.62 x 39
Overall Length: 38.9 in.
Overall Height: 5 in.
Overall Width: 2.4 in.
Barrel Length: 16 in.
Barrel Twist: 1:9.5 in.
Weight w/magazine: 7.9 lbs.

MCX-REGULATOR with ROMEO2:
Caliber: 5.56
Overall Length: 39.1 in.
Overall Height: 5.5 in.
Overall Width: 2.4 in
Barrel Length: 16 in.
Barrel Twist: 1:7 in.
Weight w/magazine: 8 lbs.

ROMEO2 Red Dot:
Magnification: 1x
Reticle: Circle Dot 3MOA
Adjustment: 1 MOA (per click)
Clear Aperture: 30mm
Illumination Settings: 12 Daylight, 3 NV
Waterproof: IPX7
Battery: CR2032
Overall Length: 1.84 inches
Overall Width: 1.32 inches
Overall Height w/o shrouds: 1.12 inch
NSN Number: 1240-01-717-4679

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