With this adaptor you can put any Weaver or Picatinny accessory on your Smith and Wesson sigma or sw9ve sw40ve pistol. S&W puts a proprietary rail system on the sigma normally, and no one really makes a good accessory for direct fitment. So save yourself the time and hassle, buy this adaptor and you will be able to put any Std accessory laser flashlight, or whatever you want on, using this adaptor.
Rail length: (1.8 inch)
Mount length: (1.5 inch) Weight (net): 35g (1.2 ounce) High quality aluminum alloy in durable black matte finish picatinny and weaver rails with 5 slots also fits most weaver accessories too Fit on Smith & Wesson Sigma 9mm, .40 S&W Made By Vector Optics