Description
SIG Sauer MCX SPEAR LT IR Rifle, 5.56 NATO, 16-Inch Barrel, Ir Cerakote, 30-Round
The SIG MCX SPEAR LT IR 16 is SIG’s lighter folding MCX rifle in Gen II reduced-IR Cerakote: a 16 in. 5.56 barrel and a tele-fold stock.
MCX SPEAR LT IR is SIG’s lighter folding MCX with Gen II reduced-IR Cerakote. Short-stroke piston. Fully ambidextrous. Interchangeable LT barrels and handguards. SIG suppressor-ready QD flash hider. Tele-fold stock on the rifles and SBRs. SIG built the IR coat for lower signature under thermal and night vision, with the same folding MCX handling as the rest of SPEAR LT. A factory optic is not installed. A factory suppressor is not included.
This is SPEAR LT, not the original SPEAR 6.8/7.62 gun and not a Rattler. Magazines follow the caliber: AR-15 5.56, 28-round steel on 7.62×39. LT barrels and handguards interchange with other MCX LT, not with SPEAR 6.8/7.62. Confirm caliber and furniture on the firearm you receive.
This 16 in. 5.56 LT IR rifle
Rifle, not an SBR and not a pistol. 16 in. 5.56. Folding/telescoping stock. Ships to an FFL.
What ships
One 30-round magazine is in the box. See the SIG MCX collection and SIG SPEAR LT.
Specifications and Included Items
- Model: RMCX-556N-16B-IR
- Caliber: 5.56 NATO
- Barrel: 16 in. cold-hammer-forged, 1:7, 1/2-28
- Action: Semi-auto short-stroke piston; telescoping/folding stock
- Finish: Gen II reduced-IR Cerakote
- Magazines: (1) 30-round polymer
- Size: Dealers list about 35 in. overall, 26.25 in. folded, 7.5 lb with magazine
- Class: Rifle. Stocked. Ships to an FFL.











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