When they first came out I bought both a UPS 9mm and USP 40. My recollection is that both were variant 1. I thought I had sold both of them a while back but apparently my USP 40 was left in my dad's safe as he asked me about it last week. Seeing as it's been sitting unused for 15+ years, are there any concerns around durability or worries about structural breakdown in that timeframe? I'll be getting it back in a week or so and will do full takedown and cleaning. just wondering if anything else before taking to the range.