The pistol Only The Few is a cosmetic variant (meaning only visual changes) of the default M9 . In fact, the gun itself looks identical- the only difference is the name of the weapon.
This weapon could only be obtainted by purchasing at least 2800 Battlefunds during December, 2010.
With a recent patch, the 'Only The Few' has had a rate of fire increase from 450 to 600 rounds per minute, and also has a high clip size (17 rounds as apposed to 15 rounds). it has had a damage buff, like the m9, but with less spread at long range.