Sig Sauer Mcx Rmcx556N16Bir Spearlt Ir 556 30R 16 Or Fde

The Sig Sauer MCX Spear LT in 5.56 NATO is a modern tactical rifle built for shooters who demand modularity, compact handling, and IR-optimized aesthetics without compromise. This 16-inch barrel rifle combines the MCX platform's proven reliability with a purpose-built design for operators, competitive shooters, and serious hunters. The FDE Cerakote finish with Gen II NIR (near-infrared) treatment gives you a rifle that performs across day and night operations while maintaining the clean, professional look that works in the field or on the range.

What sets the MCX Spear LT apart is its commitment to user control and adaptability. Fully ambidextrous controls mean left and right-handed shooters operate the rifle identically—no compromises, no fumbling. The telescoping and folding stock with push-button hinge collapses the rifle from 35 inches down to just 26.25 inches, a genuine advantage in vehicles, tight spaces, or when you need to move fast. The 16-inch cold hammer-forged barrel delivers the velocity and ballistic performance of 5.56 NATO in a package that doesn't sacrifice handling. A 1:7 twist rate stabilizes a wide range of bullet weights, and the suppressor-ready QD flash hider means you can add sound reduction or other muzzle devices without tools.

The rifle ships optic-ready with a flat-blade match trigger and accepts standard AR-pattern magazines (the 30-round capacity shown reflects typical MCX magazines). All MCX-LT barrels and handguards interchange, so you can adapt the platform to mission requirements or competition rules. At 7.5 pounds with a magazine, the MCX Spear LT stays light enough for extended carry while maintaining the rigidity and accuracy you expect from Sig's engineering. This is a rifle that bridges tactical function and everyday usability.

Key Features

• Fully ambidextrous controls for left and right-handed shooters
• Telescoping and folding stock with push-button hinge—collapses to 26.25 inches
• Gen II NIR FDE Cerakote finish designed for reduced infrared signature
• Suppressor-ready QD flash hider for sound suppression or muzzle device options
• Cold hammer-forged 5.56 NATO barrel with 1:7 twist for broad bullet compatibility
• Interchangeable MCX-LT barrels and handguards for modularity
• Flat-blade match trigger for clean, predictable breaks
• Optic-ready receiver—no iron sights, leaves rail real estate for your choice of glass
• Lightweight at 7.5 pounds with magazine

Specifications

Frequently Asked Questions

What's the benefit of the folding stock on a 5.56 rifle?

The push-button folding mechanism collapses the MCX Spear LT to 26.25 inches, making it far easier to store in a vehicle, pack in a bag, or move through confined spaces. You lose virtually no shooting ergonomics when the stock is deployed, so it's a practical advantage with no performance trade-off.

Is this rifle left-handed friendly?

Yes. The MCX Spear LT features fully ambidextrous controls, meaning left and right-handed shooters operate the safety, magazine release, and charging handle identically. There's no need to swap parts or adapt to a right-hand-only design.

Can I use standard AR-15 magazines in this rifle?

The MCX platform uses its own magazine design. The rifle ships ready to accept standard MCX magazines, which hold up to 28 rounds in 5.56 NATO. MCX and AR-15 magazines are not interchangeable.

What does the "IR" (near-infrared) FDE Cerakote finish do?

The Gen II NIR Cerakote is engineered to reduce the rifle's infrared signature, making it less visible under thermal imaging systems. The FDE color also provides a versatile, professional finish suitable for a range of operational and hunting environments.

Can I add a suppressor to this rifle?

Yes. The suppressor-ready QD (quick-detach) flash hider allows you to attach a suppressor or swap muzzle devices without tools. Check your local and state laws regarding suppressors before purchasing.

Are MCX-LT barrels and handguards truly interchangeable on this rifle?

Yes. The MCX Spear LT is built on the MCX-LT platform, so you can swap barrels and handguards to reconfigure the rifle for different calibers, barrel lengths, or mission requirements, giving you modularity within the MCX ecosystem.