Bushnell has a good deal on the AR series being $70 off on Bushnell.com. I bought the 4.5-18 x 40. It seems nice so far, but I need more trigger time before I can give a full review.
At first glance it seems to have nice bright glass and everything moves smoothly. The 18x it's a little dim, but that's a physics issue rather than a quality issue. I knew this going in though and I will be respecting the 16x limit for AAHFT springer class anyways. A 44 mm objective is the minimum size needed for 18x. The reticles on the sale are BDC only with no windage markings. I chose .308 hoping that the first holdover will be 45 yds, the second 55 yds and the distant 3rd around 70 yds. I have not tested those ranges yet.
I think it's great for the $130 sale price.