Can it be calibrated to shoot high? Unless it’s scoring headshots, it’d have to tear the zombie apart to get it to stop, which could be ammo spendy.
50 cal (M2)s are designed for light armor. If they hit a soft target, even at a mile, they tend to tear it apart.
.45 ACP = 540 joules
9mm Parabellum = 475 joules
5.56 NATO = 1,822 joules
AK-47/Soviet = 2,045 joules
7.63x51mm NATO = 3,744 joules
Browning MG .50 = 17,149 joules – also applies to the Barrett 50 cal sniper rifle.
Remember that in Afghanistan and Iraq, they were targeting insurgents and Taliban by shooting through walls to hit them when using the Barrett.
Unfortunately weapons firing the 50 cal BMG round are illegal in California (AB50) unless you have a federal firearms permit. This has caused Ronnie Barrett to refuse to service California SWAT’s Barretts as well as producing a .416 Barrett which uses the BMG round necked down to a .416 round. Higher muzzle velocity but does not deliver quite the same energy at target. Another way around California’s BMG ban is to go with the 50 DTC Euro round. The ban explicitly calls out the BMG cartridge.
As for the island I believe “Fricken Sharks with laser beams attached to thier heads” would be a great deterant!
Or turrent mount continuous wave 10KW semiconductor laser??
Or we can go for a bunch of Oddjob hats mounted on automated throwing machines (Goldfinger ref)
