We would recommend the Pro-Series 1" medium rings, PN# PR1-M!
On this rifle, a pair of our 1" medium-height Pro-Series rings would be ideal! PN# PR1-M!
On this rifle, a pair of the Pro-Series 1" medium-height rings will work best!
This optic has a magnification range of 3x on the low end, and 9x on the high end. Using catridges like .45-70, .350 Legend, and .450 Bushmaster, you should have usable holds to 250-300 yards!
With this rifle, and a 1-piece picatinny rail, a pair of the Pro-Series 1" medium-height rings should work wonderfully!
The Vortex Crossfire II Straight-Wall 3-9x50mm Rifle Scope has a BDC reticle designed to be used with straight wall cartridges. I recommend using another model of the Vortex Crossfire II if you are wanting to use it on a 6.5 Creedmoor. The models at the link below would be a better option.
https://www.opticsplanet.com/vortex-crossfire-ii-3-9x50mm-rifle-scope.html
I would recommend the Swampfox Hostile Engagement Sight Mount, which features a 1.60" centerline height which will provide enough clearance for a 56mm objective lens and allow for a comfortable head position when using on the AR10 platform. You can find the mount by using the link below:
https://www.opticsplanet.com/swampfox-hostile-engagement-reflex-sight-mount.html?_iv_tube-diameter=34-mm
I would recommend the Vortex Viper PST 2.5-10x44 Rifle Scope, which features a mult-cal reticle compatible with 350 Legend and will withstand the recoil. I would then recommend the 30mm Swampfox Hostile Engagement Sight Mount, which provides an elevated head position making it more comfortable and usable on the AR15/Ar10 platform. Both products can be found linked below:
https://www.opticsplanet.com/vortex-viper-pst-2-5-10x44-riflescope.html
https://www.opticsplanet.com/swampfox-hostile-engagement-reflex-sight-mount.html?_iv_tube-diameter=30-mm
Yes, the Vortex Crossfire II Straight-Wall 3-9x50mm Rifle Scope will work well with a rifle chambered in 450 Bushmaster. I recommend using the 1" diameter high rings located at the link below.
https://www.opticsplanet.com/leupold-backcountry-cross-slot-30mm-rings-med-matte.html?_iv_tube-diameter=1-in&_iv_ring-height=high
The Vortex Crossfire II Straight-Wall 3-9x50mm Rifle Scope will probably be too large to mount on a Marlin 30-30. The scope located at the link below would be a good choice for that rifle.
https://www.opticsplanet.com/leupold-vx-freedom-1-5-4x20-1-inch-riflescopes.html