Cant site the laser accurately! - Steiner TOR Fusion Laser Sight

I was excited to find this little laser/light made by Steiner. I've always heard they made decent products and I own a pair of steiner binoculars that I liked.
I wanted it for a compact AR pistol I built. I mounted on the under side of the rail, since it was designed for pistols.
The manual says its sighted in at the factory, but may need adjustments depending on the weapon.
Long story shorter, the laser is way off. I end up shooting at the target from about 8' away and have the leverage screw backed out so far its about to fall out, and its still shooting 6"" high. Wich from that close, I could live with if I had to and just aim low. But the adjustment screw at that point is backed out so far and loose its gonna fall out from the recoil.
Im very disappointed with this steiner product. I guess I should have listened to the review of the guy who had the same issue and had to pay to send it to Steiner to be repaired and is still waiting for it to be repaired and returned.