Ok, here is the link for the Hinata Aki AR gun scene:
Also, slightly off topic, here is another clip from the same episode that was too good to pass up (not AR):
This scene is a parody of the scene in Neon Genesis Evangelion in which Kaoru breaks into Terminal Dogma at NERV Headquarters--right down to the visible A.T. field and Beethoven's "Ode to Joy" playing. The fact that Saburou (the boy breaking in in this scene) is voiced by the same actor who played Kaoru in Evangelion only serves to enhance the parody. ^_^