Installation of the SCAR AR-15 stock adapter is simple, with no permanent alterations to the host rifle required. Remove the factory stock and slide the aluminum Vltor adapter block into the receiver, then slide the male dovetail of the receiver extension tube in from the top to engage the female dovetail of the adapter block. Adjust the extension tube up or down until the desired position is obtained, then use a bullet tip or other similar tool to tighten the large locking screw on the adapter's side to secure the tube to that location. A Mil-Spec diameter collapsible AR-15 stock may then be installed on the extension tube in the normal fashion.
NOTE: This SCAR stock adapter is the Commercial variant, and fits Semi-Auto FN SCAR 16S (Light) and 17S (Heavy) rifles ONLY. Not compatible with select fire SCAR rifles.