WHAT DOES KAC RAIL MEAN?

What sets the M4 RAS apart from other two-piece quad rails out there is that it securely locks to your rifle’s barrel nut through a clamp and screw arrangement, rendering it an extremely strong foundation on which to mount tactical extras. Incorporates a few KAC 11 Rib Rail Panels. For other rib panel lengths and colors, Click the linkThis is qui