Recommend but with caution - Viridian OPMOD Omega Compact Green Dot Reflex Sight

This is the second Viridian sight of this model I've tried. The first one was defective due to a malfunction in the battery circuitry. It never shut off so it quickly ran down the battery. I was able to return it for a replacement which was a good score for customer service. This second one though I'm having a problem with the supplied screws. I need two 6-32" and it didn't come with that size. I've had a difficult time finding the right size to attach it to my pistol. I've ordered some from Amazon and I'm hoping they will work. This is disappointing that I'm having such a hard time with something so basic as having the right screw size.