Why does this script make all models go to the model this part is in?

I have this script:

i = 0
bullet = game.ServerStorage.caliberMark45GunBullet
while i == 0 do 
    local clone = bullet:Clone()
    clone.Parent = workspace
    clone.SetPrimaryPartCFrame(CFrame.new(script.Parent.Orientation.X - 0.374, script.Parent.Orientation.Y, script.Parent.Orientation.Z - 4.284))
    i = 1
end

Does anybody know why instead of making a bullet in front of this part, it teleports all models around the model this part is in?

Because SetPrimaryPartCFrame is like the Main thing and it will teleport everything inside the model according to the Position you gave it

to move like one part inside the model do like

bullet.Part.CFrame = CFrame.new(script.Parent.Orientation.X - 0.374, script.Parent.Orientation.Y, script.Parent.Orientation.Z - 4.284)