In the rear I use a sock. I tried to make it lightweigth so I found one of those 4 or 5 dollar pillows at WallyWorld. They are hard to explain but they look like couch pillows and some are kid pillows, but they are really flexible and LIGHT!. I cut one open the filling is white little balls,like snow,, poured the contents into one of my wife's old nylon stockings. That way you can compress the filling and make it compact. I then tied off the end and put it into a sock. Taped each end for protection. It is VERY LIGHT but supports the rifle really well.
Hope this helps.
B.

Hope this helps.
B.