Me and Ashiel have been working on this one for a day or two, its completely home-brew.
due to the changes in gun rules, this is not as silly as it once have been.
Gun-Fu
Prerequisites:flurry of blows class feature, Weapon Focus with firearms.
Benefit: You can use a firearm as if it were a monk weapon.
the ramifications of this are relatively simple, one, you can flurry, and two, yo can use monk abilities through it, such as stunning fist, which we thought would ultimately be pretty hilarious to picture someone getting knocked silly by a well aimed bullet.