Well it appears as though Magnum Research has made some modifications to the Desert Eagle. According the the post the main features are a slimmer slide (Hopefully that also means a slimmer grip), an improved gas system, improved safety ergonomics, and of course rails.
That’s right the ultimate mall ninja gun (Which I admit I have one of) now has rails for all your mall ninjaing needs. Protect the mean walkways of the mall from coked up heavily armored terrorists with the .50 AE in explosive armor piercing incendiary skeleton removing.