I’ve noticed a lot of fellows shoot off of bags. I have a bag and do use it on occasion but I’ve found a cheap and more adjustable arrangement that I have used for years. It’s almost infinitely adjustable and very quick. What it consists of is a scissors car jack with a plate welded to the bottom (rubber pad under that plate not visible) and a small plate on top with a sand bag. Also a handle which is used to adjust. I use it for almost all of my shooting . You can use it with or without the rear bag. Sitting on a table or the roof of a car using the rear bag you will find you have about as rock solid of a rest as you will find What do ya think?