The Chitauri Staff is a common weapon used by Chitauri soldiers. It was there when the Massacre of the Zehoberei happened. A large number of Chitauri Staves were left on Earth following the Battle of New York.
Post Battle Cleanup
A number of Chitauri Staves were collected as part of S.H.I.E.L.D.'s cleanup after the Battle of New York, along with any other piece of Chitauri technology and artifacts. Like the Chitauri Gun, the Chitauri staves are being researched as part of S.H.I.E.L.D.'s initiative to reverse engineer Chitauri weapons.
The Chitauri Staff is an energy weapon created by the Chitauri that resembles a hybrid between a long barreled rifle and a spear-like staff. The Staff is approximately one meter in length, with a structure similar to the stock and trigger structure of traditional firearms at one end, while the firing end resembles a rough club-like structure with a single, pronounced, bayonet-like blade.
The staff is collapsible as it is composed of three separate segments that are separated at two joints, reminiscent of breach loading weapons. Chitauri soldiers often carry the staff in its collapsed form in holsters on their back. When drawn during combat the staff will automatically re-assemble and lock into its staff configuration, allowing the soldier to draw and fire the weapon in a single, quick motion.