If it’s the newer style WITH THE STAR NUT it’s very difficult . You have to KNOW HOW ITS DONE OR ITS DISASTER
IVE DONE IT AND MADE the custom tool to remove them. If it’s older style it’s pressed in with a retainer pin. Not so bad but bluing will need to be done and added cost. LW blanks are ranging $145 then machine time and blueing will make it cheaper to get new complete breech block and barrel from TW Chamber s or Knibbs.