LaserLyte now introduces a rail adapter to fit on the very popular S&W Sigma Series. This adapter changes the grooves on the receiver into a Picatinny/Weaver type rail. Then you can mount any of our clamping laser systems onto the rail. The laser systems are: LRS- Laser Rail System and the FSL- Subcompact Laser System. The Adapters are made out of a space aged polymer for increased strength and durability.