2xPointer PERST-4 IR /Green Laser Sight with KV-D2 Switch Reset +BATTERY Posted by admin On January 13, 2024 Filed under 2xpointer Perst-4 is used to point targets when observing, inspecting and watching small arms shooting at night. This product is installed on Picatinny rails. The KV-D2 swtich (in the kit)can be installed on picatinny rails and 1913 rails.