Drebin

Drebin (Born ?) is a Arms Dealer who is currently working in the middle east. It is unknown why he is located in the middle east, but possibly to support the underdog country that is fighting against the more superior PMC military.

The Arms Dealer
Drebin is a Arms Dealer who can modify any weapons, can sale weapons, and can exchange weapons on the fly. Along side Drebin is Little Gray, a monkey who doesn't wear nothing exceptiona pair of underwear. Together, Drebin and Little Gray sell modified weapons to the underdog country who is currently at war against the PMC military. Drebin meets Old Snake, and tells Old Snake that he can get rid of identity tags on the weapons of the PMC soldiers and give them to Old Snake...for a price.

His Role in MGS4
Besides being a Arms Dealer, he is most likely considered a comic relief character (as shown in the latest trailer). Little Gray apparently drinks what Drebin drinks, and shouts words obnoxiously. He also knowns a little bit of magic (as shown in the latest trailer) but it is unknown if he really knows alot of magic tricks.