Abstract: The undergarment includes a holster for holding a firearm therein. The holster includes a pouch defined by a space between an inner layer and an outer layer of fabric. The inner and outer layers are joined, such as by stitching at forward and rearward edges, but kept open at an open top and an open bottom. The open bottom is smaller than the open top to allow a barrel of a pistol to pass therethrough but to hold the remainder of the pistol within the pouch. A semi-rigid trigger guard plate can also be provided adjacent the outer layer. A magazine carrier is optionally also provided as a pouch between an outer panel and an inner panel coupled to the undergarment at a waistband thereof. Both the holster and the optional magazine carrier include padding on inner sides thereof, which padding extends up above the waistband of the underwear.