CST “Fill-The-Gap” Barrel Clamp System Instructions:

Install the barrel into the receiver; fit the barrel tenon to the receiver for correct fit if needed per barrel manufacturer’s instructions.   Align the angled clamping surface of the barrel parallel with the flat of the receiver.  Slowly tighten the #8 Setscrew with the #8 hex key until the #8 setscrew contacts the OD of the barrel or until all wobble has been taken out of the barrel as it sits in the receiver.  Install the Barrel Clamp with the two #12 clamp fasteners using the #12 hex key.  Final torque is recommended to be between 18 to 30 inch-pounds.