Mossberg 500?

[1Longbow]

 My son was given a Mossberg 500. Its missing the magazine spring and follower,and I can order those. I am familar with the Remingtom 870 and how to replace the spring and follower in that model,but could use some advise on how to get the spring and follower in the tube of this model gun. Thank you --1Longbow

[tacklebury]

Here's a link to the owners manual.  It seems to have an explanation on page 3.

http://www.mossbergs.com/manuals/500_835_590_535_en.pdf

If you need the parts too:

http://www.brownells.com/.aspx/pid=9477/Product/MAGAZINE_FOLLOWER
http://www.brownells.com/.aspx/pid=9242/Product/MAGAZINE_TUBE_SPRING