I actually have a like new in box Viper HS LR 4-16X with XLR reticle (MOA) I was contemplating selling. I bought both it and a 6-24X and without much sacrifice am using the 6-24X on my SPR build for Rocky Mountain Steel Quest.

The XLR reticle is great, very much like a HORUS but less busy. The same reticle is coming to the PST series in a few months.