Holosun HM3X 3X Magnifier
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Holosun
Overview
The Holosun HM3X 3X Magnifier is a full-size optical accessory designed to enhance your target acquisition by providing a 3X magnification for your red dot sight. Its black finish allows it to blend seamlessly with most setups while offering a clear and precise view of distant targets. This magnifier is frequently utilized in builds featuring a pistol gas system and chambered in 5.56 NATO, making it a popular choice for those looking to improve their accuracy at extended ranges.
Specifications
Available Merchants(9)
Prices checked
Price Alert
October 2026 on GunPartPicker
Holosun HM3X 3X Magnifier was the seventh most added magnifier on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it is the ninth most added magnifier on the site. Builds with this magnifier are mostly chambered in 5.56 NATO (81%, then 300 Blackout 8%), split between mid-length (46%) and carbine-length (35%) gas systems, and mostly AR-15 (93%).
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 8 of the 9 retailers we track have it in stock. It dipped to $175.99 at Sportsman Warehouse for a stretch in October 2026, well under its usual $199.99, so sales do come around. Buying today, the lowest price is $199.99 at Brownells, above October's low of $175.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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We ranked every magnifier by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Magnifier Guide →Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the Holosun HM3X 3X Magnifier
| Build | Parts | Total |
|---|---|---|
 | 27 | $2964.73 |
 | 27 | $1331.94 |
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