Caldwell .223/5.56mm Brass Catcher Holds Approximately 30 Rounds - 122231. Mesh bag attaches to the forearm of a .223/5.56mm with hook and loop webbing and captures the ejected brass. Prevents brass from being scattered in shooting area. Wire frame holds fabric in correct shape and allows brass to enter bag without disruption to bolt function or interrupt cycling. Zipper at bottom for easy emptying. Black.