Although you're looking at a 3-star gun right now, that gun is going to end up at 5-star (unless you keep it at 3-star for Tier 2 Lockdown). So think about the future. The gun is going to be Argent Peacemaker or Sentenza; those guns are what we're really talking about.
AP and Sentenza are both good guns. They're easy to use, fast, and mobile, with good range. AP doesn't shock (like Storm Driver and Polaris), so you can't completely shut down a turret. But you can kill turrets pretty easily. Get the gun the complements your other damage types. See also the Gunslinger Guide on the wiki.
Although you're looking at a 3-star gun right now, that gun is going to end up at 5-star (unless you keep it at 3-star for Tier 2 Lockdown). So think about the future. The gun is going to be Argent Peacemaker or Sentenza; those guns are what we're really talking about.
AP and Sentenza are both good guns. They're easy to use, fast, and mobile, with good range. AP doesn't shock (like Storm Driver and Polaris), so you can't completely shut down a turret. But you can kill turrets pretty easily. Get the gun the complements your other damage types. See also the Gunslinger Guide on the wiki.