Product Description
This Sig Profiled M400 Barreled Upper Assembly is complete and ready to snap onto your Lower - just add the Rear Sight or Optic of your choice to the machined Picatinny Rail of the Receiver. The highly accurate 14.5” M400 Profile Barrel is Chrome Lined and machined from 4150 Chrome Moly Vanadium 11595E Steel. Rifling is 1 x 7” Right Hand twist to stabilize the heavier 62 and 77 grain bullets, and the barrel extension has the M4 style feed ramps. A Permanently pinned & welded Extended A2 Flash Suppressor and F-Marked A2 Front Sight are fitted. (Shown with optional surefire mount)
