Very few 1-4X scopes are "true 1X" which means there is zero magnification and you can use it with both eyes open just like a red dot sight. This makes it very fast to use at close range or on moving targets and that is what all the 3-gun competitors want. Much as I love Leupold scopes, their 1X is more like 1.3X or 1.4X, and if I get a 1-4X scope I definitely want a "true 1x" setting. The 2-7X VX-I is one of the real sweet spots in the Leupold line and it is light and compact for its power, and the price is great for what you get. You might check on AR15.com in the optics forum, because there are several threads on 1-4X scopes and new scopes are coming on the market all the time since they becoming so popular.