From the pics, I'd say that's a Kisatchie (Pantherophis slowinskii). It doesn't look like an Anery to me (the term "Silver" should be banned, lol- It's very misleading anyway). Some of them are darker, and some have more browns in them. In my opinion, they are beautiful snakes.
If I get a chance, I'll take some pics of my Kastchies, but in the meantime, here are some pics from Don's site (South Mountain Reptiles):
Quote: "These have recently been described as a new species. They were formerly considered intergrades between corns and Emory's (great plains) rat snakes. They are still popularly considered to be a corn snake. Kisatchies are primarily found in Louisiana and extreme E. Texas. These are one of the darkest examples of the corn snake types. Most of ours exhibit "metallic" colors"