I've got a X95 and I've tried just about every optic under the sun on it. Currently is wearing a 4x32 Acog on a Weapons Outfitters riser. Seems to work pretty well. Just before I left the mainland I got a Primary Arms GLx 2x Prism that I put on my Hellion, that is a hell of an optic. I'd recommend checking that one out. good field of view, good magnification for the distances you're talking and decent price point.
https://www.primaryarms.com/primary-arms-glx-2x-prism-scope-with-acss-cqb-m5-5-56-reticleEvery mag i put into the rifle worked, even the D-60's. Only one that was difficult to insert or remove was the Brownells retro 25 straight mags