Heads Up, (x2)...
1. Could've sworn you need both springs and pins, otherwist the takedown pin won't remain retained?
2. I ended up kinking my rear takedown spring when I installed my Magpul Khaki MOE grip due to not paying enough attention to alignment. Fortunately, it wasn't so badly bent to use better attention to detail the second try around.
In hindsight, I would cover my grip & receiver with a rag when removing to avoid launching the spring or pin into oblivion.
SWF Historical Link
attached.