Oh heck yes they did! Smith & Wesson made double action only versions of most (if not all) of their 3rd Generation pistols. I also know that they usually can convert a DA/SA pistol to DAO if you send it in to the factory. They made both aluminum framed and steel framed versions in DAO. I have a 4586 which I enjoy very much. It's a full sized frame with a mid-sized 4 inch slide. Compact DAO versions with 3.5 inch barrels were also produced. Someone more knowledgeable than me will be along soon to list every model ever made. Sit tight.