I have an Atholon Argos 6x24x50 on my RAP in 6.5 CM with 20" barrel. So far I have about 300 rounds down range with this combo and have had no issues. The glass is good ( not SB or NF quality but good non the less). I have done multiple ladder tests on it at 50, 100, 200, and 300 rounds with very consistant results. I feel for the price It is a very good scope and have seen some reviews saying it is as good as the NXS. I would love to see a Rex review on this optic and get your opinion on it. With a price line of 323-400 it seems to be a great scope for the money.