Zombies need headshots to stop them, for me that means accuracy, low recoil, and hicap mags rule the day for a zombie gun. You need to have something thats light and short for mobility too. Common availability of ammo is a major plus as well.
For me its the AR15 in 5.56 backup would be my Glock 22.
beretta neos carbine. there's gonna be alot of them, and i could feasbly carry 3k rounds of ammo in SAW gunners pouches(2). Plus I am sure I will find hi power stuff if I need it that bad. im sure someone wont be needing it
I think the better question is what wouldn't you use?? If it came down to it I would probably have my g20 on me so that would for sure get used but I would use anything that I possibly could when it comes down to it. I suppose if you saw it coming then the first question makes a good point!
.17 HMR. Is my weapon of choice for accuracy and weight purposes. I can carry a ton of ammo and push 3000 feet a second with a round that is hardly affected by environmentals. My G19 will be my secondary.