FS: new in box Kimber 1911 adjustable rear sight. Purchased directly from Kimber but never installed. Only took out of the box to take photos. This is a complete rear sight, just install and shoot. The Kimber part number is 1100555A. I was going to install it on my Kimber 1911 Stainless Target II to replace the sight I modified, but decided to stay with the old sight. $60 including shipping, cost over $75 new.