Israel Weapon Industries Ltd. has introduced an AR-style rifle that can change from 5.56mm to .300 Blackout ammunition quickly and is designed for special operations.
The .300 Blackout, developed by U.S.-based Advanced Armament Corporation, uses a 5.56mm case cut down to accept the .30-caliber bullet, so the larger round can be used with the bolt and magazine of M16s, M4s and other AR-style weapons. Only the barrel needs to be changed out.