Everyone should check out DealExtreme: Cree Lights (Page 1)
Some of the lights are very high quality, much brighter than surefire, streamlight, blackhawk, etc and at a fraction of the cost.
Correct me if I'm wrong but, doesn't that book say the M1 Carbine is the best anti-zombie weapon? If so i would argue that one. No offense to the M1, but I'm guessing you'll find stockpiles of 5.56 and 7.62 a little easier.