I'm making a gun with RayCasting, but the Raycast can go through stuff, Help?

So, as the title says, I'm making a gun, and you can shoot through walls with certain camera angles. What I want to do is make the Raycast resize itself to not go through the wall. As You can see in the script, I already tried something, but it Didn't work. I don't know if I'm doing something wrong with RayCastParams, If I am, how do i solve it?

local Cooldown = false
local NonCollideDescendants = nil

local function MakeBullet(Start, End, Dist) 

    local Lazer = Instance.new("Part")
    Lazer.Parent = game.Workspace
    Lazer.Anchored = true
    Lazer.CanCollide = false
    Lazer.Size = Vector3.new(.1, .1, Dist)
    Lazer.CFrame = CFrame.new(Start, End) * CFrame.new(0, 0, - Dist / 2)
    Lazer.Name = "Lazer"

end

script.Parent.Event.OnServerEvent:Connect(function(player, FromP, ToP, Hum, Part)

    local PlayerStuff = nil

    for i, Descendants in pairs(game.Workspace:GetDescendants()) do

        if Descendants:IsA("Part") or Descendants:IsA("MeshPart") then

            if  Descendants.CanCollide == false then

                NonCollideDescendants = Descendants

            end

        end

    end

    for i, Descendantss in pairs(player.Character:GetDescendants()) do

        if Descendantss:IsA("Part") or Descendantss:IsA("MeshPart") then

            if  Descendantss.CanCollide == false then

                PlayerStuff = Descendantss

            end

        end

    end

    if Cooldown == false then

        Cooldown = true
        local Pos = ToP
        local CharacterParts = player.Character:GetDescendants()

        --local RayCast = Ray.new(script.Parent.Handle.Position, (ToP - FromP).unit * 100)
        local RayCast = (FromP - ToP).Unit * 100

        local Params = RaycastParams.new()
        Params.FilterType = Enum.RaycastFilterType.Blacklist
        Params.FilterDescendantsInstances = {

            PlayerStuff,
            NonCollideDescendants

        }

        --local Part, Position, Normal = game.Workspace:FindPartOnRay(RayCast , player.Character , false , true, RaycastParams)
        local RayCastResult = workspace:Raycast(FromP, RayCast, Params)
        local Dist = (ToP - FromP).magnitude

        if Dist > 100 then

            Dist = 100

        end

        local Sound = script.Parent.Sound
        Sound:Play()

        if Hum ~= nil then

            Hum:TakeDamage(50)

        end

        MakeBullet(FromP, ToP, Dist)

        wait(.28)
        Cooldown = false

    end

end)

Btw. Sorry For the messy script lol

Edit: I know what the problem is! But I still need help, It's using "ToP" as the part's end Position, and "ToP" is the Mouse Position, so what I need to do Is get the Raycast's end position.. But I don't know how :/