Advanced Technology Mil-Spec Black Tube, Spring, Buffer, Locking Ring & Nut A5102240 Please note: This supplier will be closed on 11/24, 11/25, 12/26 for the holidays. The shipping cut off is UPS"s cut off of 12/15 to try and have the products delivered by Christmas. Note: Please check your state regulations, hunting regulations, etc before placing an order with this supplier. Your order may be canceled if the item is not able to be shipped to your state due to their regulations.