Recently bought a UltraDot L/T Open Sight for my Buck Mark...I also have an UltraDot MatchDot, which is adjustable between 4 sizes of dot options. The new L/T is advertised as a '2 and 4 MOA Dot' scope, which was one reason I bought it. I presumed that meant it was also adjustable. However, while sighting it in, I noticed there was nothing in the instructions as to how to change dot sizes...so, (silly me...) I called the phone number listed on the web for 'UltraDot Distribution' to ask about it. I was told that UltraDot used to offer either a 2 MOA or a 4 MOA product, but discontined the 2 MOA...when I pointed out that they advertise it as ' 2 and 4 MOA', the guy basically yells 'DO YOU WANT A REFUND, SIR?' several times! I'm keeping the scope because it does what I need with my Buck Mark, but that experience with UltraDot will definitely stick in my mind the next time I'm in the market for a pistol scope!