This adapter will allow the MagnetoSpeed V3 to be used on most pistols and short barreled rifles that have a Picatinny style rail. Read the dimensional restrictions to see if it fits your weapon before purchasing. *This adapter is not compatible with some proprietary manufacturers' rails, or with Glock compact or sub-compact model pistols. Does not work with CZ models P-01, P-06, and 75D. *This currently only works with the V3 model MagnetoSpeed