Don't waste your money. - NcSTAR VISM SPD Micro Solar Reflex Sight

I bought this sight for about $70. I built a Polymer 80 pistol and the slide I chose has an RMR cut. I had never used an RMR and thought I'd try it out for cheap then move up if I liked it. So I mounted it up. Used a Bore laser sight to get it near zero. Went to the range. First magazine printed low and left. Made the screw adjustments. Zero didn't change. Adjusted the screws again. Second magazine through and it was still shooting low and left. A bit more adjusting. Third magazine. No dot visible. I can see the laser is on as the red light in the middle of the up and down controls is on. Looking closely I see the laser is now pointing at the lower left of the optic body. I remove the sight. Upon inspection the plastic ring that surrounds the lens is broken and coming out. After only 30 or so rounds the thing is falling apart. I contemplated pursuing the warranty but truthfully, I would never put this sight back on. To the garbage. Save your money.