Description
SIG Sauer MCX-SPEAR LT Rifle, 5.56 NATO, 16-Inch Barrel, Black, 30-Round
The SIG SPEAR LT 5.56 is SIG’s lighter folding MCX. The MCX is the piston rifle SIG has been refining for years: a short-stroke system that does not need a buffer tube, a fold, and fully ambidextrous controls. SPEAR LT lightens the handguard so it stays quick in the hands.
You get an adjustable gas valve and SIG’s flat-blade match trigger. The top rail is optic-ready. A factory optic is not installed. SIG fits a QD flash hider meant for SIG SLX and SLH suppressors; that is not a claim that every can mounts.
This configuration
You get an adjustable gas valve and SIG’s flat-blade match trigger. Bolt catch, bolt release, magazine release, selector, and charging handle are ambidextrous. The top rail is optic-ready. A factory optic is not installed. SIG fits a QD flash hider meant for SIG SLX and SLH suppressors; that is not a claim that every can mounts. This black SPEAR LT is the 16 in. 5.56 NATO carbine. SIG ships one 30-round polymer magazine. Overall length is 34.3 in. with the stock out. Weight is 7.5 lb. Twist is 1:7. Muzzle threads are 1/2-28. The stock folds against the receiver so the rifle packs shorter than a fixed-stock carbine.
What ships
A factory optic is installed only when this page says so. This item ships to a licensed FFL. See the SIG MCX SPEAR LT collection.
Specifications and Included Items
- Model: RMCX-556N-16B-LTB
- Platform: MCX-SPEAR LT rifle
- Caliber: 5.56 NATO
- Barrel: 16 in. carbon steel, cold-hammer-forged
- Twist: 1:7
- Overall length: 34.3 in.
- Width: 2.9 in.
- Height: 7.5 in.
- Weight: 7.5 lb
- Threads: 1/2-28
- Muzzle: SIG QD suppressor-ready flash hider
- Operating system: Short-stroke piston, adjustable gas
- Trigger: SIG flat-blade match
- Stock: Folding
- Finish: Black
- Magazines included: One 30-round polymer magazine
- Sights: Optic-ready rail; no factory optic
- FFL: Rifle; ships to a licensed FFL dealer









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