SIG Sauer MCX Virtus 16" 5.56 NATO 1:7 Gas Piston Rifle

Manufactured by SIG Sauer


In Stock

"We ship fast!" Order by 5PM EST M-F or 12PM EST Saturday and your order ships same day. FFL items may take longer to process.


In Stock

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time can be 1-3 days.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to


NOTE: When appropriate, areas with magazine capacity restrictions will receive a 10-round magazine substituted for the factory 30-round magazine.

The SIG Sauer MCX Virtus 16" 5.56 NATO 1:7 Gas Piston Rifle was conceived for the demands of the Special Operations community. Engineered for adaptability, accuracy, and longevity, this rifle features a 16” cold hammer forged carbon steel barrel that is user-changeable. SIG’s proven internal recoil system offers reduced recoil in a compact platform. Enhancing accuracy, the MCX Virtus features the Matchlite Duo trigger for crisp, clean feel. A freefloating M-LOK handguard offers all the mounting space you will need for your choice of accessories. With ambidextrous AR-style controls, and a folding adjustable stock, the MCX Virtus can be tailored to any shooter. 

  • 16” cold hammer forger carbon steel barrel
  • Chambered in 5.56 NATO with 1:7 twist rate
  • Short stroke gas piston system
  • 5-position telescoping folding stock
  • SIG Matchlite Duo fire control group
  • Trigger pull weight: 4.5-6 lbs
  • 15” M-LOK compatible rail
  • 1/2x28 SIG Sauer 3 Prong Flash Hider
  • Collapsed/folded length: 26.5 in
  • Overall length: 35.5 in
  • Overall width: 2.8 in
  • Height: 8 in
  • Weight: 7.9 lbs


Barrel CoatingSalt Bath Nitride
Barrel ContourLightweight
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel MaterialCarbon Steel
BrandSig Sauer
Caliber Gauge5.56 NATO
Gas System LengthCarbine
Gas System TypeShort Stroke Gas Piston
Handguard15 in M-LOK Rail
Muzzle DeviceFlash Hider
Thread Pattern1/2 X 28
Twist Rate1:7
Weight7.9 lbs

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