Current FastCast Script

local DEBUG = true          -- Whether or not to use debugging features of FastCast, such as cast visualization.
local BULLET_SPEED = 100    -- Studs/second - the speed of the bullet
local BULLET_MAXDIST = 1000                         -- The furthest distance the bullet can travel
local BULLET_GRAVITY = Vector3.new(0, -workspace.Gravity, 0)        -- The amount of gravity applied to the bullet in world space (so yes, you can have sideways gravity)
local MIN_BULLET_SPREAD_ANGLE = 0                   -- THIS VALUE IS VERY SENSITIVE. Try to keep changes to it small. The least accurate the bullet can be. This angle value is in degrees. A value of 0 means straight forward. Generally you want to keep this at 0 so there's at least some chance of a 100% accurate shot.
local MAX_BULLET_SPREAD_ANGLE = 0   -- THIS VALUE IS VERY SENSITIVE. Try to keep changes to it small. The most accurate the bullet can be. This angle value is in degrees. A value of 0 means straight forward. This cannot be less than the value above. A value of 90 will allow the gun to shoot sideways at most, and a value of 180 will allow the gun to shoot backwards at most. Exceeding 180 will not add any more angular varience.
local FIRE_DELAY = 2                    -- The amount of time that must pass after firing the gun before we can fire again.
local BULLETS_PER_SHOT = 1                          -- The amount of bullets to fire every shot. Make this greater than 1 for a shotgun effect.
local PIERCE_DEMO = false                           -- True if the pierce demo should be used. See the CanRayPierce function for more info.
local RNG = Random.new()                            -- Set up a randomizer.
local TAU = math.pi * 2                         -- Set up mathematical constant Tau (pi * 2)
local PartCacheModule = require(game.ReplicatedStorage.PartCache)

--

local CosmeticBulletsFolder = workspace:FindFirstChild("CosmeticBulletsFolder") or Instance.new("Folder", workspace)
CosmeticBulletsFolder.Name = "CosmeticBulletsFolder"

local excludeTable = {workspace.enemyStorageDeBug, CosmeticBulletsFolder}

local FastCast = require(game.ReplicatedStorage.FastCastRedux)
local Caster = FastCast.new()
Caster.VisualizeCasts = true
Caster.DebugLogging = false
local Pencil = workspace.Map.Pencil:Clone()
local Handle = Pencil.Handle

local firingPoint = Pencil.Position

local CosmeticPartProvider = PartCacheModule.new(Pencil, 100, CosmeticBulletsFolder)

local castParams = RaycastParams.new()
castParams.FilterDescendantsInstances = excludeTable
castParams.FilterType = Enum.RaycastFilterType.Exclude


local castBehavior = FastCast.newBehavior()
castBehavior.Acceleration = BULLET_GRAVITY
castBehavior.CosmeticBulletContainer = CosmeticBulletsFolder
castBehavior.RaycastParams = castParams
castBehavior.AutoIgnoreContainer = false
castBehavior.CosmeticBulletProvider = CosmeticPartProvider

function OnRayHit(cast, castResult, segmentVelocity, cosmeticBulletObject)
    -- This function will be connected to the Caster's "RayHit" event.
    local hitPart = castResult.Instance
    print(hitPart.Name)
    local hitPoint = castResult.Position
    local normal = castResult.Normal
    if hitPart ~= nil and hitPart.Parent ~= nil then -- Test if we hit something
        local humanoid = hitPart.Parent:FindFirstChildOfClass("Humanoid") -- Is there a humanoid?
        if humanoid then
            humanoid:TakeDamage(15) -- Damage.
        end
    end
end

function OnRayUpdated(cast, lastPoint, direction, length, velocity, bullet)
    -- Whenever the caster steps forward by one unit, this function is called.
    -- The bullet argument is the same object passed into the fire function.
    if bullet then
        local bulletLength = bullet.Size.Z / 2 -- This is used to move the bullet to the right spot based on a CFrame offset
        local offset = CFrame.new(0, 0, -(length - bulletLength))
        bullet.CFrame = CFrame.lookAt(lastPoint, lastPoint + direction):ToWorldSpace(offset)
        --bulletTemplate.CFrame.
    end
end

function OnRayTerminated(cast)
    local cosmeticBullet = cast.RayInfo.CosmeticBulletObject
    if cosmeticBullet ~= nil then
        -- This code here is using an if statement on CastBehavior.CosmeticBulletProvider so that the example gun works out of the box.
        -- In your implementation, you should only handle what you're doing (if you use a PartCache, ALWAYS use ReturnPart. If not, ALWAYS use Destroy.
        if castBehavior.CosmeticBulletProvider ~= nil then
            castBehavior.CosmeticBulletProvider:ReturnPart(cosmeticBullet)
        else
            cosmeticBullet:Destroy()
        end
    end
end

Caster.LengthChanged:Connect(OnRayUpdated)
Caster.RayHit:Connect(OnRayHit)
Caster.CastTerminating:Connect(OnRayTerminated)

function PencilThrow()
    print("pencil trhown")
    firingPoint = script.Parent.Pencil.Position
    local direction = (nearestPlayer.Character.HumanoidRootPart.Position - firingPoint).Unit * maxDistance
    local directionalCFrame = CFrame.new(Vector3.new(), direction)
    local direction2 = (directionalCFrame * CFrame.fromOrientation(math.rad(RNG:NextNumber(MIN_BULLET_SPREAD_ANGLE, MAX_BULLET_SPREAD_ANGLE)), 0, 0)).LookVector
    Caster:Fire(firingPoint, direction2, BULLET_SPEED, castBehavior)
end