Battery door fell off - Holosun Sub-compact HS507K-X2 1x 2 MOA Dot Red Dot Sights

QUALITY— 8 weeks and 200 rounds after my purchase, the battery and the door fell out while shooting in the woods. I hope Holosun will replace it under warranty. I’ll update this review after I contact them. PERFORMANCE— 1. It fits my P365 perfectly without an adapter. 2. I thought the 30? MOA circle round the dot would help my astigmatism, but I don’t need it. The dot alone performs well for me. 3. It co-witnesses standard P365 tritium sights; but just barely. 4. Battery replacement is done without removing the whole sight, BUT the door screw worked its way out after 200 rounds , so you should apply thread locker before using it. 5. Not much reflection from the glass coating. ACCURACY— The HA507K surprisingly didn’t require require adjustment out of the box.