The MCX platform has long been SIG SAUER’s breeding ground for developing the best rifle system in the world through extensive testing, continued innovation and customer feedback. Now SIG introduces the latest evolution with the new MCX-SPEAR LT, based on its predecessor the MCX Virtus. The new MCX-SPEAR LT has a lightened handguard with attachment screws for additional rigidity and a lightened profile barrel with improved accuracy. Other features of the MCX- Spear include an ambidextrous bolt catch and release on its lower, coyote anodized finish, and AR15 style trigger compatibility. The MCX-Spear brings the long-awaited addition of the 5.56 NATO caliber to the MCX family. Developed with a new latch system, the Spear was developed to handle the many varieties of 5.56 NATO and 223 Remington caliber ammunition while still maintaining reliability and smooth shooting.