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Sig Sauer MCX SPEAR-LT .223 Rem/5.56NATO 16″ 30+1


Category: Product ID: 21477


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The MCX platform has long been SIG SAUER’S breeding ground for developing the best rifle system in the world through extensive testing, continued innovation and customer feedback. Now SIG SAUER introduces the latest evolution with the MCX-SPEAR LT, based on its predecessor the MCX Virtus the MCX-SPEAR LT has a lightened handguard with attachment screws for additional rigidity and a lightened profile barrel with improved accuracy. Other features of the MCX-SPEAR LT include an ambidextrous bolt catch and release on its lower, coyote anodized finish, minimalist stock for maximum compact foldability and AR15 style trigger compatibility. The MCX-SPEAR LT, has once again set the bar for modular weapons technology.


  • Black Anodized Finish
  • Lightweight Ergonomic M-LOK Handguard
  • SIG Flatblade Match Trigger
  • Fully Ambidextrous Controls
  • Interchangeable Barrels
  • SIG QD Suppressor-Ready Flash Hider


  • Manufacturer: Sig Sauer
  • Model: MCX Spear-LT
  • Part Number: RMCX-556N-16B-LTB
  • UPC: 798681683321
  • Caliber: .223 Remington, 5.56 NATO
  • Capacity: 30+1
  • Sights: Optic Ready
  • Barrel Length: 16″; 1/2″-28 tpi Thread Pattern
  • Barrel Type: Carbon Steel
  • Twist: 1:7″
  • Weight: 7.5 lbs
  • Overall Length: 34.3″
  • Folded Length: 26.5″
  • Overall Height: 7.5″
  • Overall Width: 2.9″
  • Finish: Black Nitride
  • Grips: Black Polymer


  • Sig Sauer MCX SPEAR-LT .223 Rem/5.56NATO 16″ 30+1 Rifle
  • (1) 30 Round Magazine
  • Locking Device
  • Owner’s Manual


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