

A-5s were produced in a variety of gauges, with 12 and 20 predominating 16 gauge (not produced between 19) models were also available. This distinctive feature makes it easy to identify A-5s from a distance. The top of the action goes straight back on a level with the barrel before cutting down sharply towards the buttstock. It features a distinctive high rear end, earning it the nickname "Humpback". Designed by John Browning in 1898 and patented in 1900, it was produced continually for almost 100 years by several makers with production ending in 1998. The Browning Auto-5 was the first mass-produced semi-automatic shotgun. History Depiction of Auto-5 in 1909 catalog. Remington Arms and Savage Arms sold variants called the Remington Model 11 and Savage Model 720 that were nearly identical but lacked the magazine cutoff found on the Browning. The name of the shotgun designates that it is an autoloader with a capacity of five rounds, four in the magazine and one in the chamber. It was the first successful semi-automatic shotgun design, and remained in production until 1998. The Browning Automatic 5, most often Auto-5 or simply A-5, is a recoil-operated semi-automatic shotgun designed by John Browning and manufactured by Fabrique Nationale de Herstal. Two or four round tubular magazine, plus 1 in the chamber Remington Model 11, Savage Model 720 and Model 745
