--- title: "Sig Sauer MCX-R Regulator 5.56 Rifle FDE" description: "New 5.56 NATO rifle with 16\" barrel, gas-piston operation, Gen II NiR FDE Cerakote, ambidextrous controls, Arca rail, and 10rd magazine." canonical_url: "https://www.kygunco.com/product/sig-sauer-mcx-r-regulator-5.56-fde-16" meta: author: KYGUNCO "og:description": "New 5.56 NATO rifle with 16\" barrel, gas-piston operation, Gen II NiR FDE Cerakote, ambidextrous controls, Arca rail, and 10rd magazine." "og:image": "https://cdn.kygunco.com/assets/products/254334/thumbnail.jpg?v=1729698234" "og:image:height": "500" "og:image:width": "500" "og:title": "Sig Sauer MCX-R Regulator 5.56 Rifle FDE" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Rifles](https://www.kygunco.com/category/shooting/guns/rifles) / [Semi-Auto](https://www.kygunco.com/category/shooting/guns/rifles/semi-auto) / SGS-RMCXR-556N-16B ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/254334/main.jpg?v=1729698234) For illustration purposes only, this image may not be an exact representation of the product. # SIG SAUER MCX-R Regulator 5.56 NATO 16" 10rd - FDE The SIG SAUER MCX-R Regulator is a new 5.56 NATO rifle with a 16-inch cold hammer-forged carbon steel barrel, gas-piston operating system, and Gen II NiR FDE Cerakote finish. It features a Magpul SGA stock, ambidextrous controls, an integrated Arca rail, M-Lok accessory rail, two-stage match trigger, SIG compensating muzzle brake, and one 10rd polymer magazine. $2,972.99 ![Credova logo](https://www.kygunco.com/brands/credova.svg) As low as **$198.30**/month with ![Credova text logo](https://www.kygunco.com/brands/credova-text.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** Ships To FFL Dealer Handled by our expert shippers in Bardstown, KY. ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Almost gone. Order now before it sells out. Item # 254334 Style RMCXR-556N-16B UPC 798681696413 Condition New Manufacturer [Sig Sauer](https://www.kygunco.com/brand/sig-sauer) Model REGULATOR Round Capacity 10 Caliber 5.56 NATO, 223 Rem Action Semi-Auto Barrel Length 16 in Introducing the MCX-REGULATOR, using the heart and soul of the legendary MCX platform combined with a proprietary lower design, all built around shooter ergonomics comes a whole new level of MCX modularity. Never before has a ranch rifle possessed the DNA of a rifle used by elite Special Forces operators around the world. The MCX-REGULATOR is an alloy frame rifle with a gas-piston operating system, a Magpul™ SGA Mossberg 500/590 traditional stock combined with a redesigned lower receiver compatible with all MCX upper receivers. It has 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 7.62x39 and 5.56 calibers. The MCX-REGULATOR offers a built in Arca Rail for easy tripod mounting and ships with a 10-round magazine. - Reduced Weapons Visual-IR Signature GEN II NiR FDE - Cerakote - Magpul™ SGA Stock - Mossberg 500/590/590A1 - Fully Ambidextrous Mag Release, Safety Selector, and Bolt - Catch - SIG-Designed Compensating Muzzle Brake - Receiver Integrated ARCA Rail - Lower Receiver Compatible with All MCX Upper Receivers - 3 MOA ROMEO2 Red Dot Installed on RX2 model - Optic Ready: Yes - Barrel Matterial: Cold Hammer Forged Carbon Steel - Twist Rate: 1:7 - Operating System: Gas Piston - Stock Type: Magpul SGA Mossberg 500/590 Traditional - Trigger Type: 2-Stage Match - Forend Type: Alloy - Accessory Rail: M-Lok - Mag Type: Ar-15 - Mags Included: (1) 10rd Polymer Mag - Receiver Finish: Gen II NiR FDE Cerakote - Height: 2.4 in - Weight: 7.9 lbs w/ Magazine ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). 0.0 ** ** ** ** ** 0 reviews ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/sig-sauer-mcx-r-regulator-5.56-fde-16#webpage","@type":"WebPage","description":"New 5.56 NATO rifle with 16\" barrel, gas-piston operation, Gen II NiR FDE Cerakote, ambidextrous controls, Arca rail, and 10rd magazine.","name":"Sig Sauer MCX-R Regulator 5.56 Rifle 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