I have been to 500 yards with this scope so far. - Primary Arms SLx 5-25x56mm 34mm Tube Rifle Scope, First Focal Plane

I bought the scope for my Ar-10, but I have initially put it on an AR-15 so I can really test it out with high volumes of shooting using both 556 and a 22 conversion bolt. The 22 conversion bolt really allows you to make use of the Christmas tree reticle inside of 200 yards.

The only drawback is that with the mount it weighs 2.5 lb. That's why it's going to end up on an AR-10 with a 20 inch barrel which is going to balance it better.

I have done lots of reviews on this scope in my youtube channel... Poconoshooting. The large objective lens is good for low light shooting at distance, but it will still get dark after 20 magnification. In bright light no problem going up to maximum 25 magnification. I really like the auto ranging feature which gives this scope a combat pedigree.

The Athena BPR reticle is excellent. You can self-spot your own shots if you're shooting into an area that you can see the impacts. The only thing I would suggest is while they have the full man on the right side, they should put the half man on the left side. You can still autorange a man from belt to head and divide by two.