I really don't want to admit it, but my old-timer's kicked in.
First rule of working with any metal (especially firearms), Get the old dirt out! Pieces seem to fit better then.
"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)