If you are talking about the bad guy's main gun, he used a chromed version of the Jericho/Uzi/Whatever pistol:
Wait...you're talking about number 3, right?
Okay...if I remember correctly that's either a Walther PP/PPK or a Sig P232.....
He is talking about the one pointed at will smith before he shoots the bad guy at the end of bad boys.
it has 4 bbls and IIRC it is real and chamberd for .357 mag
the gun pictured above looks alot like a baby eagle