Sig Sauer MCX Spear LT 5.56 NATO 16" Rifle 30rd FDE Stock

The Sig Sauer MCX Spear LT delivers proven modularity and reliability in a lightweight platform optimized for 5.56 NATO performance. This 16-inch barrel configuration combines the battle-tested MCX operating system with modern manufacturing techniques to create a versatile rifle suitable for multiple applications.

What Makes This Different

The MCX Spear LT incorporates Sig's short-stroke gas piston system, eliminating the fouling issues common in direct impingement designs. The monolithic upper receiver provides enhanced rigidity compared to traditional AR-15 platforms, while the folding stock mechanism reduces overall length for transport and storage. Cold hammer-forged barrel construction ensures consistent accuracy across extended firing sessions.

Key Features

• Short-stroke gas piston operating system with tool-free barrel changes
• Monolithic aluminum upper receiver with integrated Picatinny rail
• 16-inch cold hammer-forged barrel with 1:7 twist rate
• Folding/collapsible Flat Dark Earth aluminum stock
• Ambidextrous controls including charging handle and magazine release
• M-LOK compatible handguard for accessory mounting
• Includes one 30-round magazine

Field performance centers on the rifle's ability to maintain zero through rapid temperature changes and extended firing schedules. The gas piston system runs cleaner than direct impingement alternatives, reducing maintenance intervals during high-volume training or competition use. Accuracy typically groups within 2 MOA with quality ammunition, making it suitable for precision applications out to 500 yards.

Technical Specs

• Caliber: 5.56 NATO/.223 Remington
• Barrel Length: 16 inches
• Overall Length: 35.5 inches extended, 26 inches folded
• Weight: Approximately 7.9 pounds
• Magazine Capacity: 30 rounds (included)
• Twist Rate: 1:7 inches
• Stock: Folding/collapsible aluminum in Flat Dark Earth
• Finish: Black nitride barrel, FDE stock components
• Made in USA

The MCX Spear LT represents a significant advancement over traditional AR-15 designs while maintaining familiar manual of arms. Professional users and serious enthusiasts recognize the value of the piston-driven system's reliability advantages. Current production models ship directly from Sig Sauer's New Hampshire facility.