Gunslingers are absolute garbage against Dragon

Gunslingers are really bad against kurgs, too, for a similar reason. You have to invest in something besides pure gunslingers, or swap something in specifically for those monster rounds. Glacial works wonders in this regard.

I always figured it was part of the comp weakness. It's such a good comp normally that it makes sense it should have some weakness at least somewhere.

Disarm works against Dragons. Build it.

Any comp without CC really. Even a single Blitz or Leona makes drag fight 10x easier.

IMO give Dragon 60% tenacity so it's not a cake walk for everyone else but reduce its health or damage or both so other comps can deal with it.

Also Dragon and Herald using items is still wonky af.

Adapt.

Here's an idea.... get Sword Breaker on a couple Gunslingers....

Gunslingers are an early-midgame comp that can transition into late-game if you get lots of debuff items. The damage carries are Lucian, Jinx, and GP. You'd have to stack one with items for them to have a chance at carrying your damage and it's often outdone by guaranteed AoEs like Sorcerers or powerful bursts like Assassins. Also Rangers and Blademasters (Draven/Aatrox) will outdamage your carries as well.

Gunslingers late game are entirely dependent on things like hush, shrink, and disarm. If you're building standard carries vs standard carries, Gunslingers will often win early game but fall off. Using GP to transition into blademaster is a common option with Gunslingers since his on-hit abuse is great with barrels and even his base damage is good. That way you can get that hypercarry damage from Aatrox or Draven without ditching your gunslingers.

Overall I'd say Gunslingers are good but there's plenty of ways to beat them. Dragon is obscene in general since Shyvana and Asol can carry comps on their own and Pantheon has a great setup ult and is potentially the tankiest unit in the game with 3 Guardians. Honestly the most success I've seen into dragons are often Assassins or Blademasters that are well geared, you need lots of physical dps to chunk the durable units over time and to try and elminate the Shyvana/Asol rapidly.

Edit: Just realized you mean the dragon mob and not the teamcomp lol. This is still kinda relevant, you'll want big damage and the blademaster transition rarely fails for that. Debuffs can help as well, but given the way Gunslingers play is by splitting their damage and debuffs around having a single target is bad for them unless you have one built to carry. Red Buff on at least one of your slingers is the easiest solution since you'll get % damage.