So i just got my antigua few weeks ago, and upgraded to blackhawk. works pretty good for a guy who doesn't have 4 weapons slot, and a good swordsmen sidearm. The only downside i see is because of it split damage and CHARGED ATTACK. Yes, the split damage sucks but i don't really mind that much, only weak to 2 monster types. The charged attack... i ALMOST never used it because it shoots 6 normal damage attack, and shoots ONE shot that goes through enemies... I want it to be JUST 1 mob-piercing bullets and do around 200% damage, just like avenger/faust's charged attack... I think this is one of the reason why people doesn't use antigua and uses specific damage type weapon for a specific run. If this happens, antigua line gun may be a lot more usefull in any situations.
Who's with me?
I see a lot of players using the Argent Peacemaker to fight Vanaduke, and its charge attack is damn handy against tightly-packed mobs if you've got a bit of distance; I certainly see it more frequently than the Blackhawk/Sentenza, which seems to be about the least popular handgun in the game. The charge attack does perhaps go on a little too long, but I'm happy with the format.