Rock Island Armory Baby Rock Replacement Front Sight. *This does not include the set screw nor the hex key. The hex key is measured 30 thousandths. **Proper gunsmith fitting required for accurate fit & safe function. PLEASE NOTE: If you purchase this item by mistake and would like to return it, We will do so gladly but will charge you a 25% restocking fee. You will also have to pay shipping back to us. Thank you and we hope this ends some of the confusion.