This HK USP Flashlight Mount, mounts a 20mm body flashlight to the USP full-size proprietary rail. The design was original posted on GrabCad by user Zachary Milhoan. The 3d printed HK USP flashlight mount uses a 2mm bolt and nylock nut for a solid fit. The mount in the images are a 1st generation version of the print. The uploaded model has reinforced rails that are less likely to brake off during install.