The durable housing is made from 7075 Aluminum, uses Holosun's K footprint, and houses the 1632 battery in a side-mounted tray for easy replacement when needed. The HS407K X2 is a direct for P365X/XL, and requires an adapter plate for slides with a four-boss interface.
Objective Lens Diameter: 0.58 - 0.77 in. Objective Window Size: 0.58x0.77 in. Attachment/Mount Type: Shield RMS Footprint. Battery Life: 50,000 hours. Operating Temperature: -30 - 60 Celsius. W/E Travel at 100 Yds: 30 MOA.Storage Temperature: -40 - 70 Celsius. What that means is if you order. It depends on where you live.