[ID] Can be id of anything. depending of convar.
[plyID] Player ID
[callback] When executed. Run this "string" into console.
[text] A Text.
[sndpath] Path of Sound File.
[imgpath] Path of Image File. Uses the same expression of "image("path/to/file.png<b>")
[I\O] If is true or false. set 0 to false and 1 to true.
-----------------------------------------------------
If the parameter contains backslash is optional.
Example:
[plyID] -- needed
[\x] -- optional
[I\O] -- needed
[\I\O] -- optional
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if contains after parameter name:
(num) is a number
($) is a string
(i\o) is a boolean
(imgpath) is a image path. (can be animated if spritesheet.)

-- Maybe you knows this.
[X] Horizontal Position
[Y] Vertical Position
[Width] Horizontal Size
[Height] Vertical Size

Create a weapon called "WEAPON" and this weapon do nothing.

cloneweaponb [wpnID] [SLOT]

Will set the name of weapon.
Set Weapon Name to [Name]

setweaponname [wpnID] [Name\$]

Set Weapon Inventory Sprite to [imgpath]

setinvwpnsprite [wpnID] [imgpath]

Set Holding Weapon Sprite to [imgpath]

setholwpnsprite [wpnID] [imgpath]

Set the Max Reserve Ammo to [maxreserve\num]

setwpnlimreser [wpnID] [maxreserve\num]

Set the Max Ammo to [maxammo\num]

setwpnlimammo [wpnID] [maxammo\num]

The game cannot remove the weapons. Then to get the weapon.
You need use in console:

equip plyID

100 + wpnID
e.g:

--
Create a Weapons with Convars.
To get the weapon use the "equip [plyID] 1000 + " weaponID

createweapon [weaponID(num)] [MaxAmmo(num)] [MaxReserveAmmo(num)] [NameOfWeapon($)] [IsSecondaryAmmo(I\O)] [InvIMG($)] [HoldingIMG($)] [UseHands(I\O)]