ZCO 4-20x50. It's no lightweight but just put it on lone peak arms fuzion ti with proof research CF barrel and couldn't be happier.
Had a kahles 3-18 skmr3 on it before.
Kahles is a great scope own 2 others but the ZCO is awesome in every way.
Got a 5-27 on order and will probably swap some others over as well.
