Extruded Shoots try the SOTAC PERST-4 which is a US$150 IR aiming device that maintains its zero when fired. The Perst-4 is a device that helps you aim at targets in the dark with a laser beam. It is a small gadget that makes laser light. You can attach it to Picatinny rails on your gun. The KV-D2 Tactical switch (included) can also fit on Picatinny rails and 1913 rails. Perst-4 has 2 laser modes.