Hi Guys - I'm new here but not to forums. I'm hoping you gents can help me get some information on a Ruger GP-100 that's a little rare and extremely hard to get any info. on. I have an Ruger GP-100 3" ss KGP-131 model # 1708. ( 3" with adjustable rear sight ) I do have some information after researching for months. I know there are more of these models around but can't seem to locate anyone with same or any information. Any help with this would be greatly appreciated. I am attaching a photo of my GP.