Sig Sauer MCX Spear-LT IR | 5.56 NATO | 16in | RMCX-556N-16B-IR
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SIG SAUER MCX SPEAR-LT IR chambered in 5.56 NATO with a 16 in cold‑hammer‑forged barrel, Gen II NiR Cerakote in Flat Dark Earth, telescoping/folding stock, fully ambidextrous controls and M-LOK handguard.
The SIG Sauer MCX Spear‑LT IR is a modular modern sporting rifle chambered for 5.56 NATO with a 16‑inch cold‑hammer‑forged carbon steel barrel and a Gen II NiR Cerakote finish in Flat Dark Earth. It features fully ambidextrous controls, a telescoping/folding stock with a push‑button hinge, and an M‑LOK forend for accessory attachment. The rifle is optics‑ready; a robust option under $1,000 that pairs well with this platform is the Vortex Strike Eagle 1-6×24 for close-to-mid range engagement and rapid target acquisition.
Designed for modularity and low infrared signature, the MCX Spear‑LT IR suits precision carbine training and competition use, as well as duty or patrol applications where a compact, configurable rifle is required.
Product Specifications
- The caliber is listed as .223 Rem / 5.56 NATO.
- The barrel measures 16 inches and is cold hammer forged carbon steel.
- The action type is Semi‑Auto.
- The finish is Gen II NiR Cerakote in Flat Dark Earth.
- The stock type is Telescoping / Folding with a push‑button hinge.
- The overall length when deployed is 35.0 inches.
- The overall length when folded is 26.25 inches.
- The weight with magazine is listed as 7.5 lb.
- The barrel twist rate is listed as 1:7.
- The muzzle is finished with a 1/2″-28 tpi threaded flash hider (suppressor‑ready QD flash hider).
- The accessory interface is M-LOK on the forend.
- The operating system is a Gas piston with an adjustable gas system.
- The rifle includes fully ambidextrous controls.
- The UPC is 798681699698.
The MCX Spear‑LT IR emphasizes modularity and reduced IR signature while retaining familiar AR‑style ergonomics and trigger compatibility. Its folding telescoping stock and ambidextrous controls make it straightforward to configure for compact transport or mission‑specific setups, and the M‑LOK handguard supports a wide range of accessory choices.
Owners and reviewers commonly praise the platform’s fully ambidextrous controls and the compact, reliable folding stock as useful, well‑executed features that aid handling and transport.
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