||“Weapon attachment. Reduces firearm carry-weight.”
|— In-game tooltip
is a weapon mod.
A sling is an attachment for the hunting rifle, varmint rifle and shotgun, it reduces the weight of the weapon by -0.3.
Can be added to guns using a screwdriver.
From newitems.txt (Project Zomboid directory/media/scripts/)
Type = WeaponPart,
DisplayName = Sling,
Icon = GunSling,
Weight = 0.5,
WeightModifier = -0.3,
MountOn = HuntingRifle; VarmintRifle; Shotgun,
PartType = Sling,
Tooltip = Tooltip_Sling,