Sig Sauer MCX Virtus (5.56mm) 16" Barrel - Semi-Auto Rifle - Black

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This Sig Sauer® MCX Noctis Patrol Semi-Auto Rifle comes with an exclusive professional series black anodized finish on all metal exterior surfaces, and folding and locking Sig Sauer iron sights. The MXC utilizes a gas-operated, short-stroke piston system that operates cleaner than a gas impingement system for maximum reliability. The gas system has 2 positions, allowing you to increase or decrease the amount of gas needed depending on ammunition, use of a suppressor, or adverse environmental conditions. A rotating bolt system fully locks the bolt closed for maximum safety. The Sig MCX Noctis Patrol semi-automatic rifle comes with a side-folding and collapsible 5-position buttstock. The full-length Picatinny rail and a free-floating, M-LOK handguard allow you to attach a wide array of aftermarket tactical accessories. A Mil-Spec trigger provides a consistent and reliable break. Unique to the MXC is an interchangeable barrel system that allows the shooter to quickly change from 5.56mm to .300 Blackout depending on the mission at hand. (Does not include the extra 300 Blackout barrel.) The 16″ barrel feature an open prong flash suppressor. Rate of twist for 5.56mm barrels is 1:7″. AR-style controls are ambidextrous. A beveled and flared mag well allows quick and unhindered mag changes. The Sig Sauer MCX Noctis Patrol is a versatile and modular semi-auto rifle that comes mission-ready right from the box.


  • Professional series black anodized finish
  • Sig Sauer folding iron sights
  • Free-floating, M-LOK handguard
  • Full-length Picatinny rail
  • Interchangeable barrel system
  • Side-folding collapsible stock
  • Short-stroke piston operation
  • 2-position gas system
  • Rotating bolt system
  • 1:7″ rate of twist
  • Open prong flash suppressor
  • Ambidextrous AR-style controls
SKU: 798681578207 Category:


Additional Information
ManufacturerSig Sauer
ModelMCX Virtus
TypeRifle:  Semi-Auto
Caliber5.56 NATO
ReceiverBlack – Ambidextrous
HandguardFreefloat M-LOK Handguard
StockSig Folding/Telescopic Stock
TriggerMatchLite Duo Trigger
Barrel Length16″ Cold Hammer Forged (1:7 Twist)
Overall Length27″ Folded; 33.5″ Collasped;  35.5″ Extended
Weight7 lbs 12 oz
MagazinesOne 30-Round PMAG
Manufacturer SKUMCX-16B-TAP-P
Manufacturer UPC798681578894

Additional Information Content

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We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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