I was gonna buy some but I decided for a few bucks of sand and spare materials I had around I could maybe make something better myself...
Here's the first one, finished:
Here's the materials cut and laid out. I cut up some old cargo pants for fabric, and used a black plastic trash bag...
Another INGO user ( :dunno: sorry I cant remenber the user name) suggested that I get a sand barrel to load and unload my firearm at home.
I think its a good idea and its as safe as you will get to make sure that you dont destroy anything (and dont hurt anyone) at home in case of accidental...