yeah. A lot in the beginning. But mostly the Gunlugger would take them on, and he has wicked armor and guns.
So, let's workshop this situation here.
Chukko is your garden variety brute, and he's got a shotgun. And he's got a major chip on his shoulder, and expects the world to cater to his every whim. The "part" that he follows around is his ego. He goes wavin' his gun around, and then the Gunlugger PC takes him out.
Fine. That absolutely doesn't end the problem. It just mutates it. This is when you decide/realize that Chukko has a girlfriend. What kind of girl would Chukko have as a girlfriend? Probably a needy hot-head who he showers with scavenged jewelry. What does she do when Chukko gets shot by the Gunlugger?
I mean, there's a couple good answers. "Nothing, at first" is a really fun answer. "She starts turning people against the Gunlugger" is another. If you're looking for a more abrupt answer, though, then, "She decides to do some revenge killing."
Now, who's she NOT going to go after? The Gunlugger. He's tough. Instead, she targets someone close to the Gunlugger. This is where the rifts between the PCs start to form. The Gunlugger goes out, kicks ass, and then his buddies pay the price.