Simple wooden frame, about 3-4 feet deep, in the corner of his shop.
The stop is built with sand and old tires - staggered. The tires hold the sand in place well.
The range is < 10 yards, but that is more than enough for checking new loads, or putting a few magazines through the handgun each day. The key to accuracy is PERFECT practice... The black bag in the picture is a brass catcher.
Best part - its out of the weather! Nice and dry, and with a space heater, it is more than enough to be comfortable.
If only he lived closer - i'd be there every day! You'll see more project testing to come here in the range.
A quick video showing the range in action: