1.Remove the trigger group form the Mini 14/ AC556.
2.Lift the rifle out of the old stock
3.Remove the hand guard from the rifle
4.DO NOT REMOVE the GAS BLOCK!!!
5.Take off the top cover of the SCAR stock by removing the 5 allen head screws.
6.Turn the SCAR-stock upside down so that the pistol grip is pointing up and the buttstock is toward you.
7.Install the rifle into the SCAR-stock by inserting the front of the stock into the Ruger gas block and rocking the rifle receiver into full contact with the stock. It’s easiest to view the procedure through the trigger-housing opening. Ensure that the right side lower receiver lug (viewed with the receiver upside down) is tight against the inside right side of the stock. Firmly squeeze the stock and receiver together. They fit together VERY TIGHTLY!
***DO NOT ALLOW THE STOCK TO TWIST to the left. If the stock twists to the left then the left lower receiver lug will strike the inside full auto cutout and the stock will not seat at all. If this happens, slightly disengage the receiver from the stock and twist the stock slightly to the right. AGAIN ensure the right side receiver lug is tight against the inside right side of the stock. Firmly squeeze the stock and receiver together. They are a very tight fit***