Click to see full view
Holosun
Overview
The Holosun HS503R is a compact micro red dot sight designed for quick target acquisition, featuring a 2 MOA dot that allows for precise aiming at various distances. Its red reticle provides excellent visibility against multiple backgrounds, making it a versatile choice for different lighting conditions. This optic is often utilized in tactical builds and competitive shooting setups, where speed and accuracy are paramount.
Specifications
Available Merchants(4)
Prices checked
Stock Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the Holosun HS503R 2 MOA Micro Red Dot Sight - 65 MOA Circle to a build in August 2026.
It was out of stock everywhere we track for all of September 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $199.99 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which optic to pick?
We ranked every optic by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Red Dot & Optic Guide →Check it against the live catalog:
Frequently Built With
Popular alongside optics on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
Bravo Company Manufacturing 5.56 NATO Mid-Length Bhf AR-15 Barreled Upper - MCMR-15 - 16"
Radian Raptor Charging Handle & Talon Safety Selector Combo - OD Green
Bravo Company M16 Bolt Carrier Group Black
No reviews yet. Be the first to review this product!