All law enforcement and military operators train using barricades, which are typically a range fixture. The problem with traditional barricades is that they have a gigantic foot print (considering the size of the barricade), and they are hard to store because of that foot print. MGM has come up with a user friendly solution.
The Barricade Bracket Set includes 4 pieces of steel, two of which telescope on to the other two, as shown in the pictures, and bolt on to your wooden barricade. When you are done training, take off the "feet", and lean the whole thing up against the wall. You can stack 15 of these barricades in an area that previously (because of the foot print) only hold one.
Wood to create the barricade is not included. A local lumber yard may have 7/16" OSB (wafer board) which is perfect for the barricade.