Original U.S. Korean War Era U.S. Army Model AN/GRR-5 “Angry 5” Shortwave Receiver For Nuclear and Biological Attack Warning - R-174/URR Receiver and PP-308/URR Power Supply Antique Shotguns built using a receiver from

built using a receiver from Ohio Ordnance

This is the late version

According to our research this most likely stands for the Gillett & Johnston foundry of Croydon

though there is partial detach

Original U.S. Korean War Era U.S. Army Model AN/GRR-5 “Angry 5” Shortwave Receiver For Nuclear and Biological Attack Warning - R-174/URR Receiver and PP-308/URR Power Supply Antique Shotguns built using a receiver fromOriginal Item: Only One Available. During the 1950s and 1960s, the United States military used a compact mobile shortwave receiver called the AN GRR 5, which was affectionately known as the "Angry 5." The GRR 5 was initially designed as a gas warning receiver to be mounted in vehicles and sound an alarm in case of a gas attack. Later, it was expanded to include nuclear and biological attack warnings as well. It's important to note that the AN GRR 5