On my CETME and several others, the front sight post is threaded in. That is used for elevation and once it is at then the side to side is adjusted. A set screw is then used to keep it in place.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)