Do not buy any ultradot. particularly the pan a/v - Ultradot Pan AV Red Dot Sight

I had the same experience as the other person that had the broken aluminum screw. I had the same thing happen to me and you can only get this screw from Ultradot. The glass in the Pan A/V then shattered and Ultradot would not honor the warranty nor replace the sight. They said the glass cannot be repaired and only offered to sell me a refurbished one for $125. This company does not care about the customer and only cares about getting money. If you buy the crappy Pan A/V you will be sorry. If any of their other products break, you as the customer will not be put first. Surprised this company is still around!