Sight block - Used to attach rear sight to receiver cover (03670/03671). One required per assembly.Does not include set screw (03681). Two (2) Rear sight block screws (03693) are required to attatch the rear sight block to the receiver cover.
This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. 
