Reloaders rejoice! Keep up with your brass without crawling around. This is the brass catcher of choice for the U. S. Marines. This handy catcher attaches to all flat top and carry handle AR's by wrapping the Velcro strap around the handguard. The mouth automatically lines up with the ejection port and the zipper on the bottom lets you empty the catcher without removing it. It's semi rigid frame makes it ideal for all shooters so you don't hit your fellow shooters with hot brass. Also for Shoot and move drills or CQB training, helps reduce the amount of loose brass rolling around on hard floors. With it's heavy duty zippered bag it is quick to empty and get back to practice. The mesh bag design allows gases to vent away from the shooter and easily view how much brass has been collected. The best part is it allows you to spend more time shooting and less time chasing empty cases. Holds approx. 60 spent cases. Can be used on all AR-15 style rifles, M-16, AR-15 with .22 kits, AR-15 with 9mm kits, AR-10's and great for the range or varmint hunting.