Sig Sauer MCX Rattler, Semi-automatic Pistol, 300 Blackout, 5.5" Barrel, Aluminum Frame, Pivoting Contour Brace (PCB), M-Lok Handguard, Black Finish, 30Rd, 1 Magazine PMCX-300B-5B-TAP Out of stock SIG MCX 300Blk 9" GRY 30Rd W/ PSB SIG’s Rattler is more compact than ever, featuring the PCB Brace (side-folding pivoting contour brace). Making it the perfect PDW weapon, for close quarter situations. It comes standard with SIG Sauer’s quick release s M-LOK hand-guard. This MCX Pistol can easily be converted into a rifle with SIG’s optional barrel kit and QD carbine length hand-guard. Every Rattler 5.56 pistol is outfitted with a adjustable gas piston system, to fine tune your suppressor and ammunition combos.
After no small amount of effort, SIG shrunk their MCX short-stroke piston-operated platform down to a 5.5-inch barreled, 300-BLK chambered bundle of fun. In pistol form, it comes with a three-position collapsible brace.