Feature A Wide View Precision: 3 MOA Dot with 19 x 28 mm Large Window Supports Fast Target Acquisition for IPSC and 3-Gun Competition A Smart Motion Power: Motion Sensor Auto-Activates and Shuts Down to Reduce Overall Battery Drain During Storage and Field Use A Quick Battery Replacement: Side-Loading Battery Design Enables Fast Tool-Free Changes Without Removing the Optic or Losing Zero A Rugged Weather Protection: IPX7 Waterproof Rating and 1000G Shockproof Structure Maintain Stable Performance in Harsh Environments A Broad Platform Compatibility: MGT Footprint Compatible w/ the RMSc/SMS Pattern, Fits Directly GLOCKA(R) 43X/48 MOS and CanikA(R) TP9 Specification See our Terminology Guide for detailed explanations of each specification. Magnification: N/A Window Lens Size: 19x28 mm / 0.75x1.1 in Parallax: Free (