Why would i pick the old over the new put them side by side. I have had no less than 4 of each. image size at 42 @ 100 yds compared to the 15-55 has to be turned up to all most 50 to be equal. Eye relief is to critical, flat ass don't shoot as good. The only one i ever seen a bullet hole at 1000 was with was the 12-42. Sent the last comp. back for impact shift, they told me it was the rings. I had all ready removed the scope and replaced it with a March 10-60 and it shot small. The rings they said were the cause, when i used them on the March it shot smaller than the comp. and when they were used with the 12- 42 they set records. I shoot free recoil and the eye relief on the NXS is very forgiving, the only issue with them was the weight....... jim