The reticle in the description isn't accurate, the reticle shown is the ACSS Predator reticle. The Griffin MIL isn't available with this optic type. Not knowing your set-up I cannot provide an adequate recommendation, but the scope's body is 30mm and so you will need a 30mm rifle scope mount. All Primary Arms 30mm one piece with two rings rifle mounts will work with this optic. Also, Primary Arms does have a reticle calibrated to the ballistic patterns of the 300 blackout. Hope this helps and have a great day.