Heya, Semper Fi!
I suppose it depends what you consider canon… fast zombies (a la “28 days”) or slow zombies (“Day of the Dead”).
Fast zombies can’t be adequately fought, too many too fast. Fortunately, their high energy usage means they “burn” themselves out and die (deanimate?) after a fairly short period (28 days?). Best defense would be get somewhere that they can’t and just hunker down. Shopping malls, small islands, and frozen north would be good places to wait out the zombie hordes.
Slow zombies are different… canon is “destroy the brain stem to destroy the zombie”. Blowing them up or blazing away in full auto only wastes ammo and creates a bigger mess to be cleaned up afterwards! Same hunker down location work here, including, to a lesser extant, anywhere thats very lightly populated (American Southwest).
As to weapons… I’d think you’ve got the odds definately against you trying to stand up fight fast zombies. Weaponry should be of the “put down” variety and necessarily of last ditch defensive nature. Hard hitting firearms like .45 autos and 12 gauge pumps and maybe a close in melee weapon like a rigid mace or even machete.
Fighting slow zombies would be doable, depending on location: good defensible hold positions in areas of low / light zombie infestation. It’d be foolish to try and fight zombies somewhere like in a dense city enviroment: too many potential attack directions and too high a density of zombies (urban: lots of people = lots of zombies).
Weapon wise, I’d pack a “man stopper” for back up: M1911 type in .45, melee weapon like rigid mace, possibly even a shorty shotgun, either pump or coach type. Standard weaponry would be something with good capacity in .22 long rifle like a Ruger 10/22 with a high capacity magazine, this would cover the 10 - 33 meter distance. 33 to 150 meters I’d go with something like a M16 with a decent optic on it. Longer range “culling” or “sentry” use I’d go with either a scoped bolt action in hunting caliber or a scoped M14 / M21, even a M1 Garand.
Automatic fire, explosive devices, flame weapons, etc, would prove to be detrimental: large expenditure of ammo, lack of “hard kill”, and potential damage brought to your fighting position. Automatic fire is inherently inaccurate… where blasting away pieces of it with full auto may slow it down a single well placed shot to the brain stem / head of a zombie will destroy it. Explosives don’t “guarentee” that shot to the brain, could possibly only cause “mobility” kills, but an immobile zombie is still a zombie, and dangerous to follow-up / clean-up operations. Flame weapons would only be of use during clean-up operations. A flaming zombie would take several minutes of burning to be neutralized, in the mean time, its stumbling about setting everything it bumps into on fire.
Sorry for the long post, but I’ve put more than a little thought to this as a “mental exercise”! Hope this helps!
Russ
Proud son of Rose and Wes