I have one mounted on an AR15. I have the BDC reticle. Still working on verifying aim points out to 300 yards. I agree with other comments about it being usable up to 8x. You can use it up to 10x, but clarity goes away after 8. Eye relief is not an issue and probably be fine on anything up to a 308 for me, but my 308 is a really soft shooting rifle. I plan on getting at least one more of these for a AR15 in 6.8 SPC. Seems like it is almost half the size of the SWFA 6x which I had mounted on another AR15.
I could not find a rear flip up cap that fit, so I have a front cap on the rear that fits great.
