Dear Fellow Airsofters-I bought the Airsoft Handgun Rail RIS Laser Sight from Airsplat.com a few weeks ago, after calling customer service and checking the reviews. Understand, I had bought an Umarex laser sight and another no name laser sight off of EBay, both which had adjustable elevation/deflection using supplied Allen wrenches. Here's the link to the sight that I bought:
http://www.airsplat.com/Items/AC-UP-AC-5131.htm

Imagine my surprise when I receive it,only to discover that it has NO elevation/deflection adjustments! What's really crazy is that the same company makes the model ST8002, which is adjustable and which has it's instructions on the back of the ST8001 sight that I bought! Would not care, but Airsplat would not pay for return shipping, so it cost me $2.29 to send back a $10.00 sight! I explained to them how they need to mention if their sight is nonadjustable, although the one lady I spoke with was nice but clueless as to why this is necessary. I have bought many things from Airsplat and perhaps this is not that uncommon with Airsoft vendors. Still, Caveat Emptor in my book- My .02-Gearhead

But the one you bought ISN'T Umarex. You can't just expect the $10 entry level plastic laser sight you bought off an airsoft site is going to match to a Umarex.