Remove the butt plate, or recoil pad, to access the stock bolt.

 

Thanks, but I am referring to the long black bolt where it connects to receiver.

 

Not a bolt, it is a tube containing a long spring, it is probably loctited on and would require heat to remove. If you bend it or put a dent/kink in the tube you have a problem.

Most users remove the nut and spring and clean and lube the tube before installing a new spring.

Pat

 

Yes, but if I want to have the receiver re-anodized, this must come out. Can someone comment on who has actually done it AND tell me what I should be careful with so I don't bend or damage.

 

As Pat said, it unscrews and has loctite on the threads. You will need to place the receiver in a soft jaw vise and carefully heat the tube (I go from the inside of the receiver) and unscrew the tube. A small pipe wrench or channel locks work fine. Same thing with the magazine tube, but use a strap wrench.