Kel-Tec PR-3AT Belt Clip, Black. Belt Clip. From pioneering the concealed carry style of handguns to creating cutting-edge bullpup rifles and shotguns, Kel-Tec works hard to create quality firearms for our customers. UPC 640832012170. Manufacturer Kel-Tec. Manufacturer Part # PR-3AT-304. Model Belt Clip. Fits PR-3AT. Color Black. Subcategory Holster Attachments & Mounting Hardware.