9x19. Elite Series Cerakoted upper receiver, with an integrated stock knuckle lower, 3.5" 1:10-twist barrel with integrated muzzle brake. Pivoting Contour Brace (PCB), dual-sided selector switch, magazine release, charging handle and bolt release. Operates from a fully-closed and locked rotating bolt, short-stroke gas piston. 14.5" long, 2.4" wide, 8" tall, 4.5 lbs.