The Sig Sauer MCX Spear Semi-Automatic Centerfire Rifle is the civilian version of the U.S. Army's XM7 rifle. The next generation has arrived. The MCX-SPEAR by SIG SAUER. FeaturesNon-reciprocating side and rear charging handle for maximum flexibility in shooting position and optics capabilityFully ambidextrous controls including ambidextrous bolt catch and bolt releaseIntegrated stainless steel QD mounts in the lower receiver for easy, secure attachment of slingsInterchangeable barrel for easy caliber conversion2-position adjustable gas valve for suppressed or unsuppressed use Includes SIG SAUER SLH and SLX suppressor-ready QD mount flash hiderMatchlite Duo Trigger for a clean, crisp breakFolding 6 position Magpul SL-M stockShips with (1) 20 round magazine