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An M4 Carbine being fired on a reflex testing range at Rodriguez Live Fire Complex, Republic of Korea by U.S. Army Pfc. Michael Freise
File:M4 Casing.jpg
Corrected and updated version. — Vanderdecken ζ ξ

I am nominating this for the detail in it and the sheer skill (or luck) of the photographer to capture the casing in mid-flight. It appears in the M4 Carbine article and was taken on March 23, 2005 by Staff Sgt. Suzanne M. Day, U.S. Air Force.

Promoted Image:Casing.jpg