Here is a piece of history. The US Air Force used these guns to train door gunners that flew bombers over Germany. They shot clay pidgeons to teach the gunners to lead the targets and later enemy planes.

This has the flaming bomb markings and the USA stamp.

This gun was military issued to the Air Force.

The 720 is directly based on the John Mosses Browning patented long recoil action. Same action as the Browning Auto 5.