Force on Force MandibleQuickly attaches to ALL Ops Core brand Helmet systems with ARC Rails installed. Provides complete neck, face, and side coverage when worn in conjunction with the step in visor. Flexible armor allows the Operator to cheek weld their rifle. Breathable mesh and foam prevents fogging and overheating with a removable lower neck skirt. Stops UTM 7. 62mm at 375 f s. Weight: . 5lbs 226g