I have a like new Matech BUIS flip sight with the bag and instructions and a set off slightly used YHM 3/4"long by 1/2" high risers. I'd like to trade for any model ARMS 40 flip sight, new or used in very good condition. My bad eyes need the protective ears of a sight to help locate the sight apeture. Email for pictures. I purchased an ARMS 40 so this was moved to the "optics and sights for sale" section.