Editing Stock Weapons

Open the actor classes browser and make sure that "Placeable classes only?" is unchecked. Here are your basic classes used in weapon development:

--Inventory > Weapon : These are stats of the base weapon, such as FireSound and ShotDelay.

--Inventory > Ammunition : These are the stats of the actual "thing" that is fired and ammo, such as Damage and MaxAmmo.

--Projectile : This consists of stats much more focused on the "thing" that is fired, such as Damage and Velocity. This would not be used for hit scan weapons, and ammunition would be used for both projectiles and hit scan. There is a subcategory for explosive projectiles.

--InventoryAttachment > WeaponAttachment : This is the 3rd person weapon that you see pawns holding. The most important property in here is the weapon mesh you set it to.

--Pickup > CTpickup : This is a class that you pick up with "F" to equip a weapon. It can also be dropped by enemies.

You can double-click any weapon class to see its properties.

Important Weapon Properties

Property	Description
AI
Burst Count	How many shots AI fires at a time.
DisplayAdvanced
DrawType	What type of class to display. For the Weapon class, it should be set to DT_Mesh.
Mesh	The mesh that is displayed in 1st person.
Events
FirstTimeSwitchEvent	When the weapon is first equipped, an event can be called.
Inventory
DroppedPickupClass	The pickup to drop when a pawn dies.
PickupClass	The pickup class that equips this weapon.
Weapon
AimError	A degree of spread while firing.
bCanThrowGrenadesWhenZoomed	This is self-explanatory.
FireSound	The sound to play when firing.
MeleeDamage	The damage done by a melee attack.
MeleeRange	The range of a melee attack.
MeleeStatusEffect	A status effect (such as electrocution) on a melee attack.
MeleeStatusEffectDamagePerSecond	Damage dealt by a melee status effect per second.
MeleeStatusEffectDuration	The duration length of a melee attack status effect.
NumZoomFOVs	The total number of zoom levels + 1. For example, a double-zoom weapon would set this to 3.
OptimalDist	AI will try to fire the weapon at this range most often.
PickupAmmoCount	The amount of ammo in the weapon when it is picked up off the ground.
ReloadCount	The amount of ammo in a magazine.
ShotDelay	The delay between each shot fired. This is a very important value to consider in balancing weapons.
WeaponKick	Describes the kick of the weapon using Yaw, Pitch, and Roll.
ZoomedDamageMultiplier	When zoomed, damage is multiplied by this value.
ZoomedAimError	When zoomed, AimError is overridden by this value.
ZoomFOVs	A list describing the amount of zoom in each FOV.
Hidden
AmmoName	The Ammunition class linked to this weapon.
AttachmentClass	The Attachment class linked to this weapon.
bZoomedUsesNoHUDarms	Setting this to true will hide the gun when zoomed.
FireMode	Use this to switch between auto and semiauto.
FPFireOffset	The local location to fire the bullet from in 1st person.
InventoryGroup	The keyboard shortcut linked to equipping this weapon.
ItemName	The display name of this weapon.
MuzzleClass	The muzzle flash effect.
Reticle	The texture to display in the center of the screen when this weapon is equipped.
WeaponType	This can be used for keeping 2 weapons in one InventoryGroup. If you want one weapon per keyboard shortcut, here is the general rule: Keys 1-4 will be Primary. Key 5 will be Secondary.

Important Ammo Properties

Property	Description
Ammunition
Damage	The amount of damage to deal for each bullet that hit the enemy. Most of the time, it is kept the same as projectile damage. (If there is a projectile class)
HitEffectsByMaterial	The particle effect to play when a bullet impacts. Most of the time, it is kept the same as its value in the projectile class. (If there is a projectile class)
MaxAmmo	The maximum amount of ammo that the weapon can hold.
PannerProperties	This is a group of properties describing how ammo is shown on the weapon itself.
ProjPerFire	The number of ammunition to fire in a single shot. This property is very useful for shotguns.
Range	This is the maximum range that ammunition will travel until impacting.
Spread	A degree of inaccuracy. Use this for shotguns. Use AimError in the weapon class for single-shot weapons.
TracerEffect	The effect that is shown when the weapon is fired. It is primarily used for hit scan weapons such as the sniper rifle.
Hidden
bInstantHit	If this is true, the weapon will be hit scan. If it is false, the weapon will use a projectile.
MyDamageType	The type of damage to inflict. For example, Shotgun damage will deal more damage to organics than droids.
ProjectileClass	This is the projectile class linked to the weapon, if it uses a projectile.

Important Projectile Properties

Property	Description
LightColor
LightColorProperties	Use these 3 properties, or use the color selector to pick a color for the light emitted by the projectile.
Lighting
bDynamicLight	This should be set to true if you want your projectile to emit light.
LightRadius	The range of the light emitted by the projectile.
LightType	Should be set to LT_Steady if you want your projectile to emit light.
Projectile
AccelFactor	The projectile's acceleration.
Damage	The amount of damage to deal for each bullet that hit the enemy. Most of the time, it is kept the same as ammunition damage.
HitEffectsByMaterial	The particle effect to play when a bullet impacts. Most of the time, it is kept the same as its value in the ammunition class.
MaxSpeed	The maximum velocity of the projectile.
Speed	The initial velocity of the projectile.

Important Explosive Projectile Properties

Property	Description
CTProjExplosive
ExplosionEffect	The effect to play when the projectile explodes.
Projectile
DamageRadius	The radius of the explosion that damage will be inflicted. As damage nears the edge of this radius, it decreases.
Hidden
bActorDetonate	Dictates if the projectile will impact with other actors.
bWorldDetonate	Dictates if the projectile will impact with world geometry.

Important Attachment Properties

Property	Description
DisplayAdvanced
DrawType	The type of object to display. Should be set to DT_StaticMesh.
PrePivot	Offset of the static mesh in local space.
StaticMesh	The static mesh to be displayed.
Hidden
MuzzleClass	The muzzle flash effect to be played in 3rd person.
MuzzleOffset	Offset of the muzzle flash in local space.

Important CTPickup Properties

Property	Description
Collision
CollisionProperties	Height and radius of the area in which the player can pick up the weapon.
DisplayAdvanced
DrawType	The type of object to display. Should be set to DT_StaticMesh.
StaticMesh	The static mesh to be displayed.
Pickup
DroppedLifetime	The time until the pickup disappears after being dropped.
InventoryType	The weapon class linked to this pickup.
PickUpMessage	The message displayed on the to of the screen when this weapon is picked up.