Wikipedia isn't always the best source of information, but out of all of the firearms they list as commonly carried, the Desert Eagle does not come up.

From this website (gotta love Google):

http://www.enemyforces.com/firearms/deserteagle.htm

"Unfortunately the "Desert Eagle" Self-loading Pistol failed to achieve reliability required for a combat pistol. Police forces rejected this pistol of it's too large dimensions, heavy weight and low magazine capacity. Also used by the police forces in an urban area it becomes dangerous for civilians as bullet proofing target has enough energy to hit the other. The same reasons made it unpopular among the special forces. It is an expensive weapon. As a result it's maintenance is also quite expensive."



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