Yes, they offer a Creedmoor reticle and it is listed under MPN: 610041.
It does not come with a sunshade, but the sunshade can be purchased separately here: https://www.opticsplanet.com/primary-arms-sun-shade-for-3-18x50mm-dmr-scope.html
It could theoretically be used with 6.5 Grendel, but these are BDC reticles designed specifically around the calibers that are listed. You would need to do your own measurements regarding bullet drop and compensation and compare it to the subtensions of the reticle.
Butler Creek sizes: Objective: 43 | Eye: 19
Yes. In fact, we placed several thousand rounds using the SCAR as a tool to test durability.
The 3-18x50mm Apollo 6.5CM used several ammunition type to calibrate the reticle and Primary Arms offers a more detailed spec sheet which includes: Hornady - 140gr ELD, 143 gr ELD-x, & 120gr AMAX at different distances.
Depends on the firearm. Does your 6.5cm have a picatinny rail or what clearance is needed to raise the center height of the scope to not hinder the sight picture are some of the questions needed to adequately provide an honest answer.
Unfortunately, the Primary Arms 3-18 x 50 mm Rifle Scope is no longer available. I would recommend the Meopta Optika6 3-18x50mm 30mm Tube Rifle Scope, which uses a zero stop/locking turrets, and can be found by using the link below:
https://www.opticsplanet.com/meopta-meopro-optika6-3-18x50mm-rifle-scope.html?_iv_availability=in-stock
Primary Arms doesn't have a dedicated throw lever to fit the 3-18x50 scope, but the ocular lens size is 35.5mm. Source a throw lever slightly larger than the ocular lens that allows for variable adjustment should work.
At this time Primary Arms doesn't produce a throw lever for this optic.