Raven doesn't add damage to Carbide's Space Pistols, and you likely replaced him with a Hero with lower ability damage in the image on the right.
u/Magyst can we get this fixed? Apparently Dashing Hawk's perk doesn't proc with Carbide either
Thanks for the tag. Writing up a bug report for this now and hopefully we can get these to buff Carbide's Lefty and Righty as well.