I am pretty sure this movie takes place in a world where guns are not reloadable. Even the guys who are specifically planning on shooting up the high-tech garage failed to bring extra ammo. In fact, the only weapon that does get reloaded is the NOS-enhanced harpoon gun.
Also, Gisele had to die. Otherwise she just abandons Han before Tokyo Drift and that is even more depressing. This way she loved him and her flaw is being the only person in these films who cannot survive a 100 ft fall from a moving vehicle without a scratch.
Did anyone else notice the movie was called "Furious 6" in the opening credits? I am eagerly awaiting "The 7" and "And 8" to be released.