Sig Sauer MCX Spear, Semi-automatic Pistol, 762NATO, 13 Threaded Barrel, SLX/SLH QD Flash Hider, Anodized Finish, Coyote, M-LOK Handguard, Ambidextrous Bolt Catch/Release, Rear and Side Charging Handle, 2 Position Adjustable Gas Valve, 20 Rounds, 1 Magazine PSPEAR-762-13B The MCX SPEAR is Sig Sauer's submission to the U.S. Army Next Generation Squad Weapon Program - a program intended to replace the current M4A1. This advanced AR-Platform comes fully equipped with a wide array of Sig exclusive features and user-friendly designs. The MCX SREAR is outfitted with fully ambidextrous controls including the safety and bolt release, as well as two non-reciprocating charging handles, one mounted on the left side and one at the rear. To ensure superior accuracy, the MCX SPEAR utilizes a Chrome Lined DLC barrel and a 2-stage match trigger.