Amazon: Holosun 509T
$20.39 $ 20. 39. Get it as soon as Fri, Jul 10. HOLOSUN HE507C-GR Elite 1x, 2 MOA Reticle, Green Dot Sight, Black, 4.6 out of 5 stars 74. $388.99 $ 388. 99. FREE Shipping by Amazon. Holosun HE507C-GR-V2 Multi-Reticle 2 MOA and 32 MOA Circle Parallax Free Pistol Green Dot Sight with Solar Failsafe and Shake Awake, Green.