Fits tightly to the USP trigger guard allowing the M3/M6 rear rocker switch to be activated by the fire control finger or the thumb of the off hand. The USP M3/M6 Adapter is available for the full size, tactical and compact USP handguns in .40 and .45 calibers.Consists of a lightweight aluminum adapter with steel inserts that easily slip over the existing USP light rails.

The installation only requires a small wrench included in the package. The rail fits tight enough to retain zero of the M6 laser. Machined from 6061 T6 aircraft–grade aluminum alloy using modern CNC machinery, then hard-coat anodized matte black per mil spec.