Reference: SPC-1504-BK
SPECPRECISION Tactical R3 Compact Reflex Red Dot Sight For Pistol or Rifle
Auto-Off / Shake-Awake 50,000 Hours Battery Life 3 Reticles (2 MOA Dot, 32 MOA Circle, 32 MOA Circle + 2 MOA Dot) Matches RMR / Holosun 507C footprint.