I was wondering how long have the Gen 4's been out? I have a new G17 Gen 4 and I noticed that there aren't many accessories for the Gen 4. I was looking online for a magwell for my Gen4 but I only found a couple and they were expensive, but I found several for the Gen 3 and they were very reasonable. Just wondering if the Gen 4 was so new that accessories have yet to hit the market at a reasonable price. Thanks for your help.