Description
The SIG SAUER MCX-SPEAR LT IR 5.56 11.5″ Pistol is a next-generation short-barreled rifle platform. Built by SIG SAUER, it features a monolithic upper receiver machined from 7075-T6 aluminum with a hard-coat anodized finish. This model stands out with its integrated folding/telescoping stock assembly and a fully ambidextrous lower receiver. It is designed for direct compatibility with a wide range of AR-15 fire control groups and pistol grips.
Key Features
- 11.5-inch cold hammer-forged barrel with 1:7 twist rate.
- Integrated folding and telescoping SIG MINI stock assembly.
- Fully ambidextrous lower receiver with bolt catch, release, and safety selector.
- Short-stroke gas piston operating system for reliable, clean performance.
- Includes a MIL-STD-1913 Picatinny rail at the 6 o’clock position for accessories.
Specifications
| Caliber / Type | 5.56 NATO / Pistol |
|---|---|
| Material | 7075-T6 Aluminum |
| Finish | Hard-Coat Anodized |
| Compatibility | AR-15 FCGs & Grips |
| Weight | Approx. 6.2 lbs |
The MCX-SPEAR LT utilizes a proprietary short-stroke piston system, which reduces heat and carbon fouling in the receiver compared to direct impingement. The 11.5″ barrel length is engineered to optimize 5.56 NATO ballistics from a compact platform, maintaining reliable cycling. This design is favored for its durability in demanding conditions and its adaptability for use with suppressors due to the adjustable gas system.
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