Need to add a couple of rounds to your existing Hi-Power mags? Introducing the Tinnitus Designs +2 Basepad compatible with Mec-Gar 13 and 15 round Browning Hi Power Magazines. This +2 option is CNC machined in the U.S. of A. out of 6061 Aluminum and is black anodized. They are compatible with the factory magazine spring. These have been designed to specifically fit the Mec-Gar current production 13 and 15 round Hi-Power magazines ONLY. Please Note: We will not ship any magazine base pads to the following states: CA, CO, CT, DE, DC, HI, IL, MA, MD, NJ, NY, RI, VT, VA, WA