One way is to remove the ribs, install two small bridges between the barrels following the Alex Martin Ribless model.

According to one of the Brown family gunmakers, who built the gun for Alex Martin, leaving out the ribs removed a 1/4 pound off the front where it matters most. It also did away with the hidden rust trap between the barrels.

If you absolutely must have a rib you can fit a carbon fiber snap-in rib as a top rib, weighing some 30 grams.

It is a thought for those who are not addicted to ribs.