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6/21/24 : Last day of the Grads & Dads 2024 Sale - 10% off Parts & Accessories / 5% off Firearms. *some exclusions may apply*

Sig Sauer MCX Rattler-LT 5.56 NATO Pistol - 7.75"

AR Pistol

Out of stock

FFL Required Before Shipping.

Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.


All of the breakthrough features of the original MCX-Rattler now in a more modular, more capable package. Designed to meet the needs of Special Operations forces, the MCX-Rattler LT features fully ambidextrous controls, including an ambidextrous bolt-catch, bolt-release an adjustable gas piston for suppressed and unsuppressed use, and is fitted with the SIG QD suppressor-ready flash-hider and a flat-blade trigger for ultimate control.

The MCX-Rattler LT also has a cold hammer forged 7 3/4 barrel and is now fully compatible with all MCX barrels and handguards making it the ultimate modular package.


  • 7.75in cold hammer forged barrel for ultra compact design
  • Fully ambidextrous controls
  • Interchangeable barrels, now compatible with all LT barrels and handguards
  • SIG Flatblade match trigger
  • SIG SLX/SLH suppressor-ready flash hider


  • Caliber: 5.56 NATO
  • Mags Included: (1) 30rd Polymer Mag
  • Mag Type: AR-15
  • Action Type: Semi-Auto
  • Barrel Material: Cold Hammer Forged Carbon Steel
  • Trigger Type: 2-Stage Match
  • Twist Rate: 1:7
  • Grip Type: PDW
  • Overall Length: 18.75 in [654.05 mm]
  • Overall Width: 2.25 in [57.2 mm]
  • Height: 7.4 in (187.2 mm)
  • Threads: N/A
  • Accessory Rail: M1913
  • Operating System: Short-Stroke-Piston
  • Weight: 5.5 lbs (2.5 kg)


  • Cable Lock
  • Mags Included: (1) 30rd Polymer Mag
  • Manual
More Information
Product Type AR Pistol
Manufacturer Sig Sauer
Twist Rate 1:7
Color Black
Mount M-LOK
Platform AR-9
Barrel Length 7.75"
Caliber 5.56 NATO

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