This is the Mec-Gar 15 round 9mm magazine for the Browning Hi-Power (HP) in a nickel plated finish.
It features a carbon steel tube and removable steel base plate. The patented Mec-Gar design holds an additional 2 rounds over the original 13 round magazine capacity.
Mec-Gar is the industry benchmark in pistol magazines and OEM manufacturer for many brands, including CZ and Browning.