having trouble filtering out what raycasting hits?

wait(0.1)

local part = script.Parent

local char = script.Parent.Parent.ID.Value

local charmodel = game.Workspace:FindFirstChild(char)

local base2 = script.Parent.Parent.Base2

local ignoreparts = charmodel,base2 -- parts to ignore--

local rayfront = Ray.new(part.Position, Vector3.new(0,0,105))

local rayback = Ray.new(part.Position, Vector3.new(0,0,-105))

local rayleft = Ray.new(part.Position, Vector3.new(105,0,0))

local rayright = Ray.new(part.Position, Vector3.new(-105,0,0))

local firingpart = workspace:FindPartOnRay(rayfront,ignoreparts)

local firingpart2 = workspace:FindPartOnRay(rayback,ignoreparts)

local firingpart3 = workspace:FindPartOnRay(rayleft,ignoreparts)

local firingpart4 = workspace:FindPartOnRay(rayright,ignoreparts)

if firingpart ~= nil or firingpart2 ~= nil or firingpart3 ~= nil or firingpart4 ~= nil then

if firingpart:IsA("Part") or firingpart2:IsA("Part") or firingpart3:IsA("Part") or firingpart4:IsA("Part") then

script.Parent.Parent:Destroy()

end

end

Im trying to cast multiple rays in an area to scan for obstacles. If I run this with the lines containing IsA() the rays dont work. but If I remove the line with IsA() the rays do work but are too sensitive and dont properly react.