Sig Sauer MCX Rattler LT, Semi-automatic Pistol, AR, 556NATO, 7.75 Threaded Barrel, Anodized Finish, Black, Pistol Brace, 30 Rounds, 1 Magazine PMCX-556N-7B-LT-PCB All of the breakthrough features of the original MCX-Rattler now in a more modular, more capable package. Designed to meet the needs of Special Operations forces, the MCX-Rattler LT features fully ambidextrous controls, including an ambidextrous bolt-catch, bolt-release an adjustable gas piston for suppressed and unsuppressed use, and is fitted with the SIG QD suppressor-ready flash-hider and a flat-blade trigger for ultimate control. The MCX-Rattler LT also has either a cold hammer forged 6 or 7 3/4 barrel and is now fully compatible with all MCX barrels and handguards making it the ultimate modular package.