Sig Sauer MCX Spear LT IR Rifle

The Sig Sauer MCX Spear LT IR is a next-generation, modular semi-automatic rifle built for lightweight performance and tactical versatility. Chambered in 5.56 NATO with a 30-round magazine capacity and 1/2×28 thread pitch, the MCX Spear LT IR blends precision engineering with field-ready features.

Key design highlights include a lightened handguard with attachment screws for enhanced rigidity, and a light-profile barrel tuned for improved accuracy. Ambidextrous controls—including bolt catch and release—make the platform ideal for left- or right-handed shooters, while a minimalist folding stock delivers maximum compactness for transport and storage. The platform accepts AR-style triggers and is purpose-built for modular weapon systems, allowing straightforward configuration for a wide range of roles.

Specifications & Features

• Caliber: 5.56 NATO

• Action: Semi-automatic

• Capacity: 30 rounds

• Thread Pitch: 1/2×28

• Lightened handguard with attachment screws for rigidity

• Lightened profile barrel for improved accuracy

• Ambidextrous bolt catch and release

• Minimalist folding stock for compact carry

• AR-style trigger compatibility

• Price: $2,600.00 (current listing)

• Availability: Out of stock (notification option on product page)

Built for operators, sport shooters, and professionals who want a compact, modular 5.56 platform that balances weight savings with accuracy and reliability.