I'm trying to identify a few small pistols. I believe they are all tear gas guns used by law enforcement a number of years ago. I'm hoping to gather some information on them. 1) This appears to be a .22 caliber. It is definitely a rim-fire. The nose unscrews to allow one round to be inserted. The back knurled knob is spring-loaded. When it is pulled back and locked into place, the palm lever on the side discharges it. There are no markings on it at all. 2) This appears to be a .38 caliber gas gun. It appears to be black painted brass. The nose unscrews to allow the placement on one .38 caliber round. Just like above, the knurled knob on the end is spring-loaded and, once pulled back, it can be discharged by pressing the small button on the side. It has writing which reads: ART BURNSIDE & CO, SPOKANE, WN. USA The pocket clip reads: FAULTLESS USA 3) This appears to be a mechanical pencil on one end and a .38 caliber gas gun on the other. Once again, no markings at all. The knurled end can be unscrewed to allow one .38 caliber round to be inserted. The lever on the side is sprin-loaded and it can be drawn back and released, to discharge the round. I will attempt to attach photos, sorry about the quality. I'm new here and I hope this is the proper forum to ask these questions, if not, I apologize. Thanks, Jeff.