The Viper will have a more advanced illumination system, as well as a 6x erector, as opposed to the Crossfire-II's 4x!
Absolutely! LPVO's are quite popular on lever-guns!
Using a piggy-back style mount, this would be easy to achieve! Look for options from Burris, American Defense Manufacturing, or Reptilia!
There are 6 intensity settings!
This would be an excellent and fairly common pairing on the Ruger SFAR! Pair with the Sport-series 30mm Cantilever!
This would be an outstanding option for your .450!
With the correct mount, yes! We would recommend the Sport 30mm cantilever mount!
This would not be ideally placed on the Samson rail, as it does not have enough eye-relief to accommodate. In magnified optics, our Crossfire-II Scout Scope would be the only option, otherwise.
This reticle is well-structured to fit a variety of bullets in the 5.56 palate, and subtends well with most 7.62x51mm loadings!
I would recommend using a 1-piece scope mount such as the Vortex Sport Cantilever 30mm Rifle Scope Ring Mount, which can be found by using the link below:
https://www.opticsplanet.com/vortex-30mm-cantilever-riflescope-ring-mount-for-ar-15.html?_iv_code=VX-MT-CMT67-CM-202