Description
Sig Sauer MCX Spear LT 5.56 – Lightweight. Modular. Combat-Ready.
The Sig Sauer MCX Spear LT in 5.56 NATO delivers cutting-edge rifle performance in a lightweight, mission-adaptable platform trusted by professionals worldwide. Building on the legacy of the MCX line, the Spear LT features a refined, slim-profile handguard, fully ambidextrous controls, and an improved recoil system—making it a powerhouse for tactical shooters, law enforcement, and serious enthusiasts alike.
Crafted with a forged aluminum upper and lower receiver, the MCX Spear LT offers unmatched durability while remaining highly maneuverable. The gas-piston operating system ensures cleaner, cooler shooting with enhanced reliability under high round counts or adverse conditions.
Key Features:
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Caliber: 5.56 NATO / .223 Remington
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Barrel Length: 16 inches
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Operating System: Gas piston, short-stroke with adjustable gas block
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Weight: Approx. 7.4 lbs (unloaded)
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Handguard: Lightweight, free-floating M-LOK handguard
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Controls: Fully ambidextrous – safety, mag release, bolt catch
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Stock: Magpul SL-M or folding stock (model dependent)
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Trigger: Match-grade flat blade trigger
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Muzzle Device: 3-prong flash hider (suppressor ready)
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Finish: Hard-coat anodized (available in Black or FDE)
Why Choose the MCX Spear LT?
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Combat-Proven Design – Evolved from the MCX Virtus and Spear program rifles, offering battle-ready reliability.
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Modular & Upgradeable – Barrel swaps, caliber conversions, and stock changes made easy with user-configurable components.
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Suppressed Ready – Adjustable gas block ensures optimal performance suppressed or unsuppressed.
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Enhanced Handling – Lightweight construction with refined ergonomics and recoil system for better balance and faster follow-up shots.
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Ambidextrous Control Layout – Built for left- or right-handed shooters, with full mirroring of major controls.
Specifications:
| Feature | Details |
|---|---|
| Caliber | 5.56 NATO / .223 Rem |
| Barrel Length | 16″ Carbon steel, cold hammer-forged |
| Gas System | Short-stroke gas piston w/ adj. block |
| Overall Length | ~34.3″ (stock extended) |
| Weight (Unloaded) | ~7.4 lbs |
| Handguard | Lightweight M-LOK free-floating |
| Muzzle Device | 3-prong flash hider |
| Trigger | Flat-faced match trigger |
| Stock | Folding, adjustable (model dependent) |
| Finish | Black or FDE anodized |
Includes:
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Sig MCX Spear LT 5.56 Rifle
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User manual & warranty card
- One magazine
Whether you’re outfitting for duty, building a high-performance tactical setup, or simply want a top-tier rifle with next-gen features, the Sig Sauer MCX Spear LT 5.56 delivers without compromise.
Order now and experience the next evolution of modular rifle performance.





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