...5 gallon bucket from hardware store and a bag of sand normally used as balast in rear drive vehicles. Maybe cost me total 10-15 bucks...I filled the bucket and tapped the sand flat. I used a lid and cut out a notch in the top slightly larger than my USP. The trigger guard rests on the edge of the bucket lid edge cut out for balance and pointing assistance. When unloading the discharged round lands on the lid usually for easy retrieval...
Over a year later, but thank you for the simple instructions! The lid would help keep the mess to a minimum, and I suppose a panel of Kevlar or a couple phone books underneath wouldn't hurt, either!
Good for a newbie, like me, to make preparations before I bring my first gun home.