Leitner-Wise’s has teased their upcoming BUIS the “e-Sight” on their blog. Touted as the ultimate low-profile optic, the e-sights are a pair of standard-height flip-up sights. They are tight-lipped on additional details, but suffice to say they are low-profile. If the production model looks anything like these, I would hazard to saw they will be the smallest on the market to date.
The evolution of sights are here. The lowest profile sights on the market. Machines out of billet aluminum. e-Sights will be up for pre-order shortly and shipping soon after.