Remove the buttplate. Take a very large flat-bladed screwdriver (about 18") and insert it into the hole in the back of the buttstock and tighten the very large screw that attaches the buttstock to the receiver. Shine a light down the hole in the stock & you will see the very large screw.
Any of the 124 series.
The model 5100 Stevens shotgun has a plastic stock
Boyd's stocks on the net.
Depends on what you mean by "tighten up the stock", the exact configuration, model and maker. Depends on what you mean by "tighten up the stock", the exact configuration, model and maker.
If the owner's manual doesn't have instructions, seek out a qualified gun smith.
Go to a fashion show, knock on the door of the model Stevens and give him 77 kisses.
You may be able to find the information you are looking for through this web site: http://www.huntingsociety.org/gunstocks.html
Try searching for a Savage model 620A or Stevens 620 stock on ebay, or gunbroker.com. The model M060 Westernfield is a Stevens 620, while a Westernfield model 60 is the Savage 620A
Try e-gunparts.com
Try e-gunparts.com
Weing stocks
Try e-gunparts.com