My first of many Auto-5's was purchased about 6 years ago from Cabela's. A 1947 standard 12 with a Poly-Choke, it looked just like the guns I saw hunters using when I was a kid. It was fun to shoot, but it bugged me that I couldn't get inside to give it a good cleaning. And it was filthy in there. I finally discovered Art Isaacson's videos, ordered a set of Browning Screwdrivers from Brownell's, and plunged in. That this gun still cycled with that much crud in it was amazing. In the video Art warned about the rail on the old Locking Blocks being prone to failure but I was happy to see that mine was as good as new. This gun became my main shooter for the next few years. It was also responsible for my curiosity about the type and led me to collect a dozen more. I finally bought a Light Twelve as a replacement a couple of years ago and turned this one into a Bowling Pin gun with the addition of a magazine extension.