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Sig Sauer MCX
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

Sig Sauer

MCX

$2,849.99
$2,599.99
Sale Price
Available

Sig Sauer MCX SPEAR-LT, Semi-automatic Rifle, 223 Remington/5.56 NATO, 16" Barrel, Anodized Finish, Black, Side Folding Stock, Flatblade Match Trigger, 13" Lightweight Ergonomic M-LOK Handguard, Fully Ambidextrous Controls, 30 Rounds, 1 Magazine RMCX-556N-16B-LT-B

Key Details
Brand Sig Sauer
Manufacturer Part Number RMCX-556N-16B-LT-B
UPC 798681683321
SKU SGRMCX-556N-16B-LT-B
Current Stock 92 available
Quantity Updated Jun 11, 2026 6:03 PM
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Purchase Requirements
  • This product requires FFL processing before pickup or transfer.
  • Age verification is required before checkout completion.
  • California compliance or distributor restriction review may apply.
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

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.

Features
  • Black Anodized Finish
  • Lightweight Ergonomic M-LOK Handguard
  • SIG Flatblade Match Trigger
  • Fully Ambidextrous Controls
  • Interchangeable Barrels
  • SIG QD Suppressor-Ready Flash Hider
Specifications
UPC: 798681683321
Manufacturer: Sig Sauer
Manufacturer Part #: RMCX-556N-16B-LT-B
Model: MCX
Model (Alt): SPEAR-LT
Action: Semi-automatic
Barrel Length: 16"
Capacity: 30 Rounds
Finish: Anodized
Grips: Sig Sauer
Type: AR