This Magnum Research Magazine is a factory original replacement part, manufactured to the same specifications and tolerances using the same materials as the OEM magazine that came with the pistol for a guaranteed fit and reliable operation. When it comes to semi-automatic firearms, the ammunition feeding device often determines if, and how well, the gun functions. Therefore, whether for use as a backup mag for your concealed carry or duty pistol, or simply for saving a little reloading downtime while at the range, keeping a few spare factory magazines handy is never a bad idea. This Magnum Research factory magazine fits the original Baby Desert Eagle and new Baby Desert Eagle II pistols chambered in 45 ACP with a semi-compact frame (3.93" barrel). It features a 10-round capacity and black polymer base plate.