Army Arms vaults are hard wired and linked via internet and land line to a central monitoring center as well as local and state LE departments. They are not a rack in a closet. Opening such a vault requires several protocols executed in a timely manner and the walls, floors and roofs of such vaults are reinforced concrete plus other materials, embedded with anti-intrusion sensors. Motion sensors inside, camera outside etc. This was either a well executed outside job or an inside job. Time was of the essence.
The common individual arms for USAR units are M9 pistils, M16A2 or A4 rifles, M4 carbines, plus crew served light and medium machine guns such as the M249 and M 240B. Night vision devices, optics for M16/M4s and crew served, plus all sorts of sensitive communication-security devices.
This is a big deal.
M9 pistils?? Guns for flower children?
Don’t forget your M203s and 40mm Mk19s....got those in our BN unit armory. HE and HEDP rounds stored offsite close to range though.