THE ULTIMATE GUIDE TO KNIGHTS ARMAMENT M4 QUAD RAIL

What sets the M4 RAS other than other two-piece quad rails available is the fact it securely locks to your rifle’s barrel nut by way of a clamp and screw arrangement, rendering it an exceptionally strong Basis on which to mount tactical add-ons. Includes 3 KAC 11 Rib Rail Panels. For other rib panel lengths and colors, Just click hereThe complete