Midwest Industries MIURR Upper Receiver Rod Black 4140 Steel Rifle M4,M16 1 Pieces This Upper Receiver Rod Works With Any Standard M4/M16 Barrel Extension And Is Excellent For removing Stubborn/seized Barrel nuts Without Damaging The Upper. It Is Designed For Muzzle Device installs And Can Be Used To Install Forward Assist/Port Door Covers. It Can Be installed horizontally Or vertically In a Bench Vise. Made In The USA.
