First cut cardboard into good size to work with and wrap around gun with the handle sticking out, then take a peice of cardboard the size of the open side and tape on Then get a peice of cardboard for the bottom and tape on.
Step 2: Wrapping it up
Now get duct tape and cut into long strips that will wraparound the entire holster and do that untill it is covered
Step 3: Belt loop
Now cut a peice of cardboard that is about 4 inches long and tape on
Step 4: Your done
Now slide your belt through the loop and and load up, your ready to win the battle