The Evolution Continues.

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 new MCX-SPEAR LT, based on its predecessor the MCX Virtus the new 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. And the new MCX-SPEAR LT brings the long awaited addition of the 7.62x39 caliber to the MCX family. Developed with a new latch system the 7.62x39 MCX-SPEAR LT was developed to handle the many varieties of 7.62 caliber ammunition while still maintaining reliability and smooth shooting. The New MCX-SPEAR LT, has once again set the bar for modular weapons technology.



NFA Restricted item


National Firearms Act (NFA) firearms are Machine Guns, Suppressors, Short Barreled Rifles, Short Barreled Shotguns, and other firearms requiring ATF approval and registration.

Order Processing Time: NFA firearms require ATF approval and registration at each step in the transfer process. In-stock items require approximately one month for ATF approval and shipment to your FFL. Backordered and special order items require additional processing and shipping from the manufacturer and can take an additional 2-6 months (suppressors on the short end and others towards the long end depending on the manufacturer).

SIG WRMCX-300B-9B-LT-SBR

Retail: $2,979.99
Price: $2,300.00
You Save: $679.99 (22.8%)
Availability: Out Of Stock / Not Available For Back Orders
Usually ships In : No Current ETA. Join Our Email List for Updates

Manufacturer LE/Mil Program Pricing - Purchaser Must Provide Proof of Eligibility

SIG MCX-SPEAR LT FEATURES:

  • Lightweight Ergonomic Handguard
  • SIG Flatblade Match Trigger
  • Fully Ambidextrous Controls
  • Interchangeable Barrels
  • Rocksett® SIG QD Suppressor-Ready Flash Hider



Order Details

  • Not available where prohibited by law
  • Proof of eligibility is required and we will keep a copy of the eligibility on file.
  • Offer not available in all states
  • All web sales must go through a Federal Firearms Licensee
  • Your order confirmation will contain information on how to submit your qualification credentials and FFLs information
  • Coupon codes/Discount codes not applicable
  • Please check out the Individual Firearms Sales page for more details on the ordering process.
SKU WRMCX-300B-9B-LT-SBR
CALIBER300 BLK
BARREL LENGTH9 in (229mm)
MAGS INCLUDED(1) 30rd Polymer Mag
MAG TYPEAR-15
ACTION TYPESemi-Auto
STOCK TYPEFolding
BARREL MATERIALCarbon Steel
TRIGGER TYPE TBA
TWIST RATE1:5
FOREND TYPEAlloy
GRIP TYPEPolymer
RECEIVER FINISHBLACK
OVERALL LENGTH27.75 in (704.9 mm)
OVERALL WIDTH2.9 in (73.7 mm)
HEIGHT7.5 in (190.5 mm)
THREADS5/8 in - 24
ACCESSORY RAILM-LOK
OPERATING SYSTEMGas Piston
WEIGHT6.4 lb (2.9 kg)

We are proud to participate in SIG Sauer's Law Enforcement / Military Discount Program which offers many popular SIG weapons at significant discounts to eligible customers. Eligible customers are:

  • Military: Active, Reserve, NG, Retired, Medically Retired, Service-connected Disabled Veteran, and Honorably Discharged
  • Law Enforcement: Federal, State, and Local Active or Retired Sworn Officers
  • Law Enforcement Academy cadets with cerfified enrollment documentation
  • Corrections Officers including Parole and Probation Officers
  • Active 1st Responders: Firefighters, Paramedics, and EMT's
  • Armed Licensed Federal, State, City and Private Security Officers with ID and Documentations
  • Court Judges
  • District and Deputy District Attorneys

You MUST qualify as one of the above to purchase this weapon. In accordance with our manufacturer agreements, we are only permitted to sell LE/Mil program weapons to eligible individuals.