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Sig Sauer MCX Spear-LT 5.56 NATO Rifle - 16" - Black

Manufactured by Sig Sauer
Manufactured by Sig Sauer
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Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



Built for the modern marksman, the Sig Sauer MCX Spear-LT 5.56 NATO rifle excels in versatility. Its ambidextrous controls cater to both left and right-handed shooters, ensuring seamless operation and lightning-fast access to critical functions. Its intuitive design allows for instinctive manipulations and efficient transitions, giving you the edge in dynamic situations.

The advanced barrel technology of the 16” carbon steel barrel combined with a match-grade trigger synergize to deliver unparalleled accuracy and consistency, shot after shot. Whether honing your skills on the range or engaging in high-stakes scenarios, the MCX Spear-LT empowers you to hit your mark with unwavering confidence.


  • 16” carbon steel barrel, 1:7 twist
  • 1/2x28 threads
  • Folding stock
  • Flat blade match trigger
  • Lightweight ergonomic M-LOK handguard
  • Fully ambidextrous controls
  • Polymer grip
  • Gas piston operating system
  • Includes one 30-round polymer magazine
  • Weight: 7.5 lbs
  • Overall length: 34.3”
  • Folded length: 26.5”

The MCX Spear-LT's folding stock transitions from compact to combat-ready in an instant, making it ideal for urban environments or rapid deployments. Pack it in your backpack, deploy from a vehicle, or maneuver through tight spaces – this rifle adapts to your needs.

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Barrel Coating
Barrel Length16
Barrel MaterialCarbon Steel
BrandSig Sauer
Caliber Gauge5.56 NATO
FinishHardcoat Anodized
Gas System TypeShort Stroke Gas Piston
Magazine Capacity30
Thread Pattern1/2 X 28
Twist Rate1:7
Weight7.5 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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