Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: how many yards can you shoot up to with this and will it work for a BSA red dot
Document: Only gripe is that the windage and elevation adjustments screws are marked wrong (the adjustment for elevation is really windage and vise versa)...but who cares, the adjustments work and I was able to center the red dot, once its set, leave it alone. Very impressed with this item given the low price point. Glad I didn't spend more on the Primary Arms, Vortex or Eotech magnifiers. I think for a China made magnifier, this is one of the tops.
I have an unmagnified red dot sight for my 22lr semi-auto, but iron sights is not enough for these old eyes. Purchased this product to assist me in long shots with the rifle. does not come with mount as stated.
I had to adjust mine to center my 512's red dot ring, 2 turns down, got it centered. Left/right was spot on already. The adjustments click too, like a mil dot click on a scope. Screw on caps protect those adjustment knobs too.It comes with caps (held together by elastic band).
Excellent magnifier. I combined it with the Ade flip mount and a UTG Red Dot scope. Works great. Very clear glass, very well built. I'd buy another if I needed one and am recommending to friends. This one is mounted on an AR platform firing 5.56. Have put a couple of hundred rounds through the rifle with this on it with no problems.
I bought this to go with my UTG Red/Green Dot sight on my S&W M&P AR15 and it's great. I did have to use the riser to get my UTG site to level with the magnifier. It works as promised and was easy enough to site in. Yes you will need to do that even if you have your red dot sighted. I was also able to use this in conjunction with my Iron Sights which I did not think was possible at first.
Mounted on an AR-15. First off, the eye relief on this thing is great...2.5 - 3 inches for me...not exaggerating. I'm using it with an Aimpoint PRO and there is little to no distortion of the red dot. Using the diopter adjustment makes the red dot sharp. It also clears the Magpul Backup rear sight using a Primary Arms standard flip to side mount. Good quality glass and clear.
I bought this 3x Mag to sit behind my Aimpoint Pro. This is SO much nicer than anything in it's price range! Plus the ability to adjust the windage and elevation are great, and they work very well!
I mounted this with the Ade Advanced Optics Quick Flip to Side 90 Degree 30mm ring. It's less cost together, than getting the TMS version that comes with this magnifier (about 93 bucks vs 85 bucks).Together, they work perfectly. Perfect height with that Ade quick flip ring, this magnifier and an Eotech 512.The glass seems good, clear, bright. Eye relief is not too bad, wish it was a bit longer.
I can get groupings within 1in at 50 yards with the iron sights. Great for the price. I bought this without the mount on purpose as I read the mount that came bundled with it easily broke. I picked up an Ade Advanced Optics Quick Flip and it works great.
This paired with the ADE Advanced optics FTS mount was a great addition to my Eotech xps3-2. This combo cowitnessed with my eotech perfectly. I didnt need shims or adapters. The magnifier glass was really sharp and clear. When you look through the eotech the retical is pixelated. Throw this magnifier in place and the dot and circle are now sharpened into detail. I love the fact that i could dial my reticle into the center view of the magnifier with the elevation and windage knobs.
Answer: yes