--- title: "Sig Sauer Moss Green AR-15 Rifle 5.56 30rd" description: "Optics-ready 5.56 NATO AR-15 rifle with a 16\" chrome moly steel barrel, Moss Green Cerakote, M-LOK handguard, ambidextrous controls, and 30rd capacity." canonical_url: "https://www.kygunco.com/product/sig-sauer-sigm400sdi-5.56-nato-optics-ready-16-30rd-moss-green" meta: author: KYGUNCO "og:description": "Optics-ready 5.56 NATO AR-15 rifle with a 16\" chrome moly steel barrel, Moss Green Cerakote, M-LOK handguard, ambidextrous controls, and 30rd capacity." "og:image": "https://cdn.kygunco.com/assets/products/285434/thumbnail.jpg?v=1745586056" "og:image:height": "500" "og:image:width": "500" "og:title": "Sig Sauer Moss Green AR-15 Rifle 5.56 30rd" --- > 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-RM400-SDI-16B-MSGRN ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/285434/main.jpg?v=1745586056) For illustration purposes only, this image may not be an exact representation of the product. # SIG SAUER SIGM400SDI 5.56 NATO Optics Ready 16" 30rd - Moss Green The SIG Sauer M400 SDI is an optics-ready semi-automatic AR-15 rifle chambered in 5.56 NATO. It features a 16-inch 1:7 twist chrome moly steel barrel, Moss Green Cerakote finish, M-LOK handguard, Picatinny top rail, ambidextrous controls, a 2-stage Matchlite Duo trigger, and 30rd capacity. $1,599.99 ** 5 interest-free payments of **$320** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** ![Credova logo](https://www.kygunco.com/brands/credova.svg) As low as **$196.02**/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 Fulfilled by a partner warehouse. ** Partner Fulfilled ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Selling fast. Limited quantities available. Item # 285434 Style RM400-SDI-16B-MSGRN UPC 798681701216 Condition New Manufacturer [Sig Sauer](https://www.kygunco.com/brand/sig-sauer) Model SIGM400SDI Round Capacity 30 Caliber 5.56 NATO Action Semi-Auto Barrel Length 16 in SIG Sauer M400 SDI AR-15 – Moss Green Cerakote (RM400-SDI-16B-MSGRN) Built for versatility and performance, the SIG Sauer M400 SDI is an optics-ready semi-automatic AR-15 chambered in 5.56 NATO, combining reliability with premium components. Finished in a rugged Moss Green Cerakote, this rifle is purpose-built for shooters demanding both function and form. The 16-inch chrome moly steel barrel features a 1:7 twist rate and 1/2"-28 TPI tapered shoulder, topped with a SIG flash hider-compensator. Utilizing a mid-length direct impingement gas system, it delivers smooth cycling and improved reliability. Fitted with a 6-position Magpul MOE-SL stock in black and a reduced angle pistol grip, it’s ergonomically optimized for control and comfort. The rifle also comes equipped with a flat-faced, 2-stage Matchlite Duo trigger and ambidextrous controls for enhanced precision and versatility. A M-LOK compatible handguard and Picatinny top rail offer customizable mounting options for optics and accessories. - Finish: Moss Green Cerakote TM - Weight: 7 lbs - Overall Length: 36.5 in (extended), 33.25 in (collapsed) - Handguard: M-LOK, Moss Green Cerakote - Controls: Ambidextrous - Grip: Reduced Angle Shop with KYGUNCO for the best selection, competitive pricing, and exceptional customer service. Experience the difference that comes with buying from a trusted outdoor retailer with over 20 years of experience in the industry. ** 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-sigm400sdi-5.56-nato-optics-ready-16-30rd-moss-green#webpage","@type":"WebPage","description":"Optics-ready 5.56 NATO AR-15 rifle with a 16\" chrome moly steel barrel, Moss Green Cerakote, M-LOK handguard, ambidextrous controls, and 30rd capacity.","name":"Sig Sauer Moss Green AR-15 Rifle 5.56 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