The Sig MCX-Spear LT IR rifle built upon the legacy of its predecessor, the MCX Virtus. Features fully ambi controls; folding brace w/push-button hinge; reduced IR Signature Gen II NIR; interchangeability with all MCX LT barrels and handguards and Sig suppressor ready QD slash hider.
| Manufacturer | Sig Sauer |
| Model | MCX Spear-LT IR |
| Caliber | 5.56 NATO / 223 Rem |
| Type | Rifle |