Description

The SIG Sauer MCX Spear LT is the latest evolution of SIG Sauer’s MCX rifle family, combining modern modularity with a lightweight design. It features a gas piston operating system, ergonomic lightweight handguard, and fully ambidextrous controls. Available in multiple calibers and barrel lengths, the Spear LT supports quick accessory mounting, folding stock operation, and is optics ready. It’s designed for reliability, versatility, and adaptability for a wide range of shooting applications.

Specifications

Platform & Operation

• Rifle platform: MCX family (modular tactical rifle)
• Operating system: Short-stroke gas piston, closed rotating bolt
• Action: Semi-automatic (civilian models)
• Controls: Fully ambidextrous (bolt catch/release, selector, magazine release)

Calibers

• 5.56×45 mm NATO
• .300 AAC Blackout

Barrel & Length Options

• Barrel materials: Cold-hammer forged carbon steel
• Barrel lengths (typical):
  • ~9″ (.300 Blackout)
  • ~16″ (5.56 / 7.62×39)

Weight & Size

• Weight: ~6.5 lb depending on configuration
• Folding stock for compact transport/handling

Features

• Lightweight ergonomic handguard with M-LOK attachment points
• Optics-ready Picatinny rail
• SIG QD suppressor-ready flash hider threaded 1/2×28 (5.56)
• Compatible with AR-15 style triggers (in addition to legacy MCX triggers)
• Standard 30-round (or similar) magazines depending on caliber
• Coyote brown anodized finish (common on civilian models).