Cheap, but don't expect too much. - Caldwell AR-15 Brass Catcher

I recommended this even though I only gave it 3 stars because it was cheap and I bought it with the intent to modify it to suit my needs. Would not recommend to anyone who thinks they can use as is - you're going to be disappointed. If you fall in that camp, Caldwell has catchers that can be used out of the box that are a little more expensive - go with one of those.