You need to completely dis-assemble the bolt. depress the bolt sleeve lock plunger and unscrew the the rear section(with the safety in the safe position). Compress the spring and remove the C-clip and compression washer from the striker.If it is an older gun, remove the spring by pulling the sleeve to the rear slightly and turn it a 1/4 turn in either direction. drift out the cross pin in the bolt end piece at the rear of the bolt sleeve.Remove the end piece towards the rear. Remove the striker,use a very small punch and to push the pin besides the safety inward. (safety in off position) into the center of the bolt sleeve. Turn the safety around towards the rear and lift it up and out.