This is a DeSantis Gunhide Magazine Pouch known as the A47, model A47TJGGZ0.
The A47 is a single magazine pouch with belt clip. It has a unique magazine-tension device inside for added security. Available in black or tan unlined leather. Accommodates belts up to 1 3/4" wide.
Features:
Single magazine pouch with belt clip
Unique magazine-tension device inside for added security
Accommodates belts up to 1 3/4 wide