A thread on TRF reveals some of the new generation of small munitions: Raytheon's new mini-missile could be a great scale project!
At about 2' long, this would easily be modeled. The Griffin Small Tactical Munition (STM) comes in two flavors: The 'A' version is intended to be dropped from under wing and the 'B' version is fired from a container (tube) launcher. Ref: Tiny 2-Foot Missile Could Be ‘Months’ Away From Drone War (video included), Wired Danger Room (7/13/2012, Ackerman); Griffin Small Tactical Munition (STM), Defense-Update.
Not as easily model-able there is also AeroVironment's Switchblade. Ref: U.S. Troops Will Soon Get Tiny Kamikaze Drone (video included), Wired Danger Room (10/18/2011, Ackerman).