--- title: "SIG SAUER SIGMCX 300 Blk SBR 5.5\" Blk PDW Upper/Stock 30rd" canonical_url: "https://www.kygunco.com/product/sig-sauer-sigmcx-300-blk-sbr-5.5-blk-pdw-upper-stock-30rd" meta: author: KYGUNCO "og:image": "https://cdn.kygunco.com/assets/products/310532/thumbnail.jpg?v=1786479727" "og:image:height": "500" "og:image:width": "500" "og:title": "SIG SAUER SIGMCX 300 Blk SBR 5.5\" Blk PDW Upper/Stock 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) / [Class III](https://www.kygunco.com/category/shooting/guns/class-iii) / [Short Barrel Rifles](https://www.kygunco.com/category/shooting/guns/class-iii/short-barrel-rifles) / SGS-WRMCX-300B-5B-R-LT-SBR ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/310532/main.jpg?v=1786479727) For illustration purposes only, this image may not be an exact representation of the product. # SIG SAUER SIGMCX 300 Blackout 5.5" 30rd PDW SBR - Black $2,336.99 ** 5 interest-free payments of **$467.40** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** NFA / Class 3 NFA transfer requirements vary by product and location. Additional documentation, approvals, or a qualified dealer may be required. Check local and state regulations to ensure eligibility and compliance before purchasing. ** 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. Item # 310532 Style WRMCX-300B-5B-R-LT-SBR UPC 798681697472 Condition New Manufacturer [Sig Sauer](https://www.kygunco.com/brand/sig-sauer) Model SIG MCX Round Capacity 30 Caliber 300 AAC Blackout Action Silencer Barrel Length 5.5 in Engineered for maximum capability in an ultra-compact package, this PDW-style rifle delivers the power of .300 Blackout in a highly maneuverable platform built for close-quarters use, discreet transport, and suppressed shooting applications. Its short-stroke piston system, folding stock, and mission-configurable design provide exceptional reliability and adaptability, while fully ambidextrous controls ensure efficient operation from either shoulder. Whether deployed from a vehicle, used in confined spaces, or optimized for suppressor use, this platform is designed to perform when mobility and firepower are equally important. FEATURES - Fully ambidextrous controls - Adjustable gas system for suppressed and unsuppressed operation - Short-stroke piston operating system - Compatible with interchangeable barrels - Compatible with interchangeable handguards - Folding minimalist stock - Suppressor-ready flash hider - Free-float M-LOK handguard - Integrated Picatinny rail sections - Accepts AR-15 pattern magazines SPECIFICATIONS - Caliber: .300 Blackout - Action: Semi-automatic - Barrel length: 5.5" - Barrel material: FNC steel - Twist rate: 1:5 - Thread pitch: 5/8"-24 - Stock: Folding minimalist - Grip material: Polymer - Trigger: Curved - Forend material: Alloy - Magazine capacity: 30 rounds - Receiver finish: Black anodized - Overall length: 24" - Folded length: 17.1" - Width: 2.25" - Height: 7.4" - Weight: 5.8 lbs. ** 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-sigmcx-300-blk-sbr-5.5-blk-pdw-upper-stock-30rd#webpage","@type":"WebPage","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"SIG SAUER SIGMCX 300 Blk SBR 5.5\" Blk PDW Upper/Stock 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