Re: AR brass catcher
Most of my AR (or M1, M1A, Carbine, etc) shooting is done practicing for HP or CMP GSM matches. I don't like wierd stuff hanging off my rifles.
What I did was buy one of tent like contraptions with netting all around. Mine cost a hair over 100 bucks and is 10 X 10, and I can shoot offhand also. All the brass stays inside, no searching the grass or gravel for my brass. It also works for pistol shooting also. I also get to shoot in the shade.