Melee Weapons

Their Base Damage is equal to their Weight plus your strength.
When salvaging these items, you get that many parts. When Repairing, you need that many parts.
Durability works the same way with Melee and Ranged Weapons, though Ranged weapons degrade faster. When you hit something with a Melee weapon it loses 5 durability. When you fire your Ranged weapon it loses 5 durability.
When either a melee or ranged weapon falls below half its durability, its damaged is reduced to half rounded up.

Name                     Weight    Salvage   Repair    Durability    Noise(feet)
Wooden Bat          3              30            84          300             30 
Axe                        3              30            84          300             30
Cleaver                 2              24            67          240              30
Hatchet                 2              19.            53          192              30
Carving Knife       1               18             50.         180               30
Machete               3              24            67          240              30
Mower Blade       8              24            67          240               30
Rebar Blade         8              48            134        480               30
Bastard Sword     8              36            100       360                25
Bayonet                2              24            67        240                27 
Mace                     6              30            84       300                 25
Police Baton         2              22.5         63       225                 30
Crowbar                6              45            126     450                 60
Pipe                       3              22.           63      225                  30
Tire Iron                3              34            94.5   337.5                30
Pipe Wrench        5               49.5        138.    495                   60
Big ol' Shovel      10              30           84      300                   60
Saw B. Sword      10             20           56      200                   60
Sledge Hammer 15              50           140    500                    95

Ranged Weapons

Its Guns n' Stuff. Ranged weapons have a Base damage.
Shooting Range: The range listed on the weapon is its maximum range it can fire. You can fire up to half its Range without penalty. You gain a -1 for every 25% beyond it. 
Repairing a ranged weapon cost 3x the salvage value.
Arrows/Bolts: You have a 50% chance to recover an arrow, whether you missed or hit.
Burst Fire: Fires 3 bullets at one target. Accuracy -1.
Full Auto: Fires 6 bullets which can target up to 3 things. Accuracy -3.

Type                       Ammo   Weight   Salv.    Dura.    Influ.  Power    Range

AK-47 Assault       7.62       8            60         600       325   20          400ft
This weapon has Full Auto. Magazine Size 30. Its Noise is 120ft

AR-15 Rifle            5.56         7         46           460     250    30           600ft
This Weapon has a Magazine Size 30. Its Noise is 120ft.

Crossbow           Bolt           9         60             600     70    15           300ft
This weapons ammo size is 1. Its Noise is 15ft.

M9 Pistol            9mm         2          46             460     50    15          300ft
This Weapon has a Magazine Size of 12. Its Noise is 60ft.

Submachine     9mm         8.5         46           460     125    15        200ft
This Weapon has Full Auto. Its Magazine Size is 30. Its Noise is 120ft.

PPK Pistol       .22            1              39            390     50       10      200ft
This Weapon has a Magazine of 12. Its Noise is 40ft.

Sawed-Off           12g      5             50            500         125     30   30ft
This Weapon has a spread of 10ft, It attacks each target within 10ft of the initial target. It has a Magazine of 5. Its Noise is 120ft.

Sniper Rifle         .50      12.5        75             750         325      50  600ft
This Weapon comes with a 3x Scope. This scope allows you to fire up to 3 times its range without penalty. You must use an action to aim for this effect. The Magazine is 4. Its Noise is 120ft.

Ammo

Ammo is very limited in the world, and as such, should be cherished. You can find ammo in places such as Gun Shops, Warehouses, Police Stations and some residential houses. Ammo takes up a slot in your backpack like all other items, but can be stacked. Smaller rounds such as can be stacked up to 32 for one inventory slot. Larger ammo such as 12g shotgun shells, .45 and .50 can only be stacked up to 12 per one inventory slot.

Executions

These are insta kill manuvers that you can perform when under the right circumstances. Most Elites are immune to these effects, but will take triple the normal damage. There are two types of Executions. 

Ground Execution: This happens when a zombie is laying on the ground.  These can be performed with any melee weapon.
Stealth Execution: This happens wen you are able to sneak up behind a zombie without any other zombie noticing you. These can only be performed with a slashing or piercing melee weapon that weighs 3lbs or less.