Talk about a cluster fu€&.
First: there should be an eye protection mandatory warning somewhere on the back of the stock ...because when you unscrew that keeper it's gonna fly!
Two: The only way you're getting that's double spring back in it is to have a 17 HMR cleaning rod handy.
And so I am making this thread just to save the next guy that has to do this a little bit of work.
So before you remove the keeper on your stock: take a large head screwdriver and loosen the keeper. Then take your 17 HMR guide rod and put it into the hole that's in the center of the keeper and slide it all the way down, until it bottoms out. Then with the small screwdriver circle around the back of your stock until the keeper comes out be cautious: it was Leap halfway up the cleaning rod.
To get the double spring back into your stock and replace the keeper: once you have lubricated and cleaned underneath the stock, replace the stock, butt pad, insert the lubed double springs, place the keeper with its washer on the 17 HMR rod, insert the rod
into the double spring, and bottom it out once again in the stock action guide. Now crush everything down the rod into the back of the stock. Everything should line up. Take a small screwdriver with a large handle and press the keeper into alignment with the threads. Begin turning the entire rifle on a piece of carpet to protect the crown. Press hard an feel for it screwing itself in. The keeper will eventually find it's threads and hold the spring. Now take a large screwdriver and torque until it's snug.
I just got my first L1A1 sporter, and it came to me from the store completely free of lube, oil , or preservative. I paid $700 for it. Imbell receiver with an old British kit but a nice shiny bore.