I'm running a Holosun HE503GU-GR (translation: side battery compartment, Green Circle Dot reticle) on my AR 300 Blackout. I ditched the factory supplied mount (a Holosun weak spot) and replaced it with a MidWest Industries Non-QD 100% Co-witness mount. I should note that the Holosun 403, 503 and 515 series red dots are compatible with any Airmpoint T1/T2 mounting base.
Even with the mount change the total price was still under $300. or less that half the price of an Aimpoint T2.
It's running 100% so far.....
Last edited by Shadow; 09/14/20. Reason: clarity
