The ATN X-Sight comes in two models: the 3-14x and 5-20x. Having mounted, zeroed and tested both, I was very impressed with everything about them, including the price. These are solid and well-structured pieces of kit and seem extremely robust.
Compared to the Pulsar N970 Digisight, which I have used along with the N870, the X-Sight is half the price and the performance is comparable and offers high-definition colour during the day. After 4 weeks of use, I’ve had no problems with it holding the zero, unlike the two Pulsar N970 devices that I had on test, which seemed to have accuracy issues.