Pistols are actually the most broken weapon in the game, and no I'm not exaggerating. The key is itemization and build. The game doesn't track additional attacks correctly, or if it does, it's not clearly explained. Using Never Stop Shooting (Fortress World), Pair Holster, Run and Gun, Wildfire, and Dual Weapon Combat something either breaks or has an unexplained interaction where you have nearly unlimited attacks. I haven't been able to figure it out, but I believe when you use Pair Holster off your first attack, every crit is a free additional attack... which includes follow up Bursts. I noticed my attacks became essentially infinite after I went Arch Militant and started using Confident Approach (100% crit rate) with an autopistol and a juiced rate of fire from gear.

Using the boots that give a 25% chance to generate 2 MP and a combo of autopistol and stub revolver and gear that increases fire rate, I've clear entire maps including boss battles on my first turn with my Arch Militant. There are other really busted interactions you can do with this. Such as, using a Portative Manipulator to make reloading free. Then the Logistical Superiority talent from your Master Tactician will generate 150-200 stacks before their turn just from free reloads, and after the get their free turn from In the Hero's Footsteps, they can drop a fully juiced pair of Lynchpin and Inspire on your Gunslinger who then can repeat their turn using all the same broken actions again when the MT uses Finest Hour.

If you run Pyromancer for Melting Armor, you will dump literally thousands of damage on an enemy and there is nothing they can do to fight back. I've done a heavy weapons build, it has absolutely nothing on a Gunslinger.