SIG SAUER Mcx Spear 6.8x51 16" Coy 20+1
$4,350.69
SIG SAUER Mcx Spear-lt Ir 5.56 Coy 16"
Sig Sauer
$2,707.69
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Sig Sauer
SIG SAUER Mcx Spear-lt Ir 5.56 Coy 16"
The SIG SAUER MCX Spear-LT IR in 5.56 NATO delivers professional-grade performance in a compact, versatile platform — purpose-built for shooters who demand reliability, modularity, and a mission-ready finish straight out of the box.
- Chambered in 5.56 NATO / .223 Rem for proven, widely available ammunition
- 16" barrel offers optimal velocity, accuracy, and legal compliance nationwide
- Flat Dark Earth (FDE) Cerakote finish provides corrosion resistance and tactical aesthetics
- Collapsible and folding stock enables compact transport and adaptable length-of-pull
- Optics-ready design accepts a wide range of scopes, red dots, and night-vision devices
- Includes one 28-round magazine with a total capacity of 28+1 rounds
Who This Is For
The MCX Spear-LT IR is ideal for serious sport shooters, competitive marksmen, and home-defense enthusiasts who want a premium, battle-tested rifle with modern ergonomics. Its folding/collapsible stock and optics-ready upper make it equally at home on the range or in a truck-mounted storage setup, appealing to anyone who values versatility without sacrificing reliability.
Specifications
| Model | MCX Spear-LT IR |
|---|---|
| SKU / Model Number | RMCX-556N-16B-IR |
| Caliber | 5.56 NATO / .223 Rem |
| Barrel Length | 16" |
| Capacity | 28+1 Rounds |
| Finish | FDE Cerakote |
| Stock | Collapsible / Folding — Coyote (FDE) |
| Sights | No Sights / Optics Ready |
| Magazine Included | 1 × 28-Round Magazine |
| Action | Semi-Automatic |
| Brand | SIG SAUER |
Frequently Asked Questions
What makes the MCX Spear-LT IR different from a standard AR-15?
The SIG SAUER MCX Spear-LT IR is built on SIG's proprietary MCX platform rather than a traditional AR-15 layout. Key differences include a short-stroke piston gas system (versus direct impingement), a folding stock that allows the rifle to be stored or transported in a significantly more compact configuration, and a chassis designed to accept a broader range of accessories and caliber conversions. The result is a more versatile, cleaner-running rifle compared to a standard AR-15.
Is this rifle compatible with standard AR-15 magazines?
Yes — the SIG SAUER MCX Spear-LT IR accepts standard STANAG-pattern AR-15/M16 magazines, including the included 28-round SIG magazine. This means you can use most commercially available 5.56 NATO / .223 Rem magazines with this rifle, offering excellent flexibility for training and competition use.
What optics or accessories work best with the MCX Spear-LT IR?
Because the MCX Spear-LT IR ships optics-ready with no iron sights installed, it pairs excellently with a wide range of optics including low-power variable optics (LPVOs), red dot sights, holographic sights, and night-vision compatible devices. The Picatinny top rail provides a solid, repeatable mounting platform. For shooters looking to maximize the "IR" capability suggested in the model name, compatible infrared illuminators and NV-ready scopes are highly recommended pairings.
