Colt R-80 “Monitor” automatic rifle
Designed by John M. Browning c.1917 and made by Colt Manufacturing Co. c.1931 for law enforcement agencies like the FBI.
.30-06 20-rounds detachable box magazine, pistol grip, Cutts compensator, gas operated select fire.
An intended heavy duty alternative to the ubiquitous Thompson .45ACP submachine guns of the interwar era, that would sometime not be enough to reliably pierce through a car to reach the outlaw inside. The Monitor was notoriously used during the ambush shooting of Bonny and Clyde, while they themselves also carried one in the trunk of their car.