For a quick fix, I've taken a baseball cap (one with a snap or velcro adjustable band), hooked it around the scope and let it drape over the ejection port. The brass just kind of lands beside the gun. It works best off of a bench. There are several brands of actual brass catchers out there, but I haven't used any. I'm the kind of guy that looks at something, says "I'm not paying that much for that", spends twice that much in material trying to make it myself, then goes back later and cusses as he shells out the cash to buy it.