Black powder makes alot of smoke. It obscures vision, what if, at touch AC range the Gunslinger used smoke from his guns to aid in obscuring vision, or obfuscating from the enemy?
Something along the lines of a daze, or a nerfed obscuring mist?
The reasoning behind this is the gunslinger is accustomed to and expecting the smoke, where as his enemy is not.
At higher levels there could be piggy back deeds that worked off this mechanic adding to his AC vs. ranged attacks, miss chances or even possibly getting a hide in plain site after he full attacks the previous round?
Names for the deed I came up with "light em up" or "acrid smoke"
I suggested a new similar deed (but a 3rd level deed) in my Proposal for the Gunslinger Final Version thread, called SMoking Guns. Its a rewrite of the one in the 1st round Gunslinger v.1.5.0 pdf I had posted. I changed it to allow for an "at least 1 grit point" component, and a "spend grit" component. It's based directly on the the Obscuring Mist spell, with a nerfed version for the "at least 1 grit" and the full version costing grit. I also gave it some dual-pistol wielder love. Here it is for easy reference.
Smoking Guns (Ex): At 3rd level, whenever the gunslinger has at least 1 grit point, she can create a cloud of smoke on her square that obscures normal sight (not including darkvision) beyond 5 feet. It also grants her concealment (attacks have a 20% miss chance) against any creatures further than 5 feet away. The smoke cloud remains for one round per level or until dissipated. A moderate wind (11+ mph), such as from a gust of wind spell disperses the cloud in 4 rounds, while a strong wind (21+ mph) disperses it in 1 round. If the gunslinger spends 1 grit point, the smoke cloud obscures all sight, including darkvision. It also grants her concealment (attacks have a 20% miss chance) against any creatures within 5 feet, and total concealment (50% miss chance, and the attacker cannot use sight to locate the target) against any creatures further than 5 feet away. If the gunslinger is dual-wielding pistols, or discharges two barrels from a double barrel pistol or other multi-barreled firearm, the smoke cloud fills one additional adjacent square of the gunslinger’s choice.