Owners of S'W Sigma Series, HK USP and USP Compact pistols can take advantage of the increasing number of universal-type rail mount accessories in the marketplace with LaserLyte's new line of Mounting Rail Adapters. The new adapters allow owners of these pistols to choose from more that just the proprietary accessories offered by the gun manufacturers to fit their own proprietary rails. LaserLyte's adapters change the grooves on the forward frame into standard Picatinny/Weaver-type rails a nd allow quick mounting of lasers, lights and other accessories under the barrel on the Sigma and USP pistols. LaserLyte offers two different laser sighting systems that fit the Picatinney/Weaver-type rails the LRS Laser Rail System and the FSL Subcompact Laser System. The new Mounting Rail Adapters are created from space-aged polymer for increased strength and durability and will not mar the finish of any firearm.