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EOTech
Overview
The EOTECH EXPS3-4 Holographic Weapon Sight (HWS) paired with the G45 Magnifier offers builders a versatile optic solution, featuring a 0.5 MOA dot size for precise targeting and 1/2 MOA adjustments for fine-tuning. With a battery life ranging from 501 to 1,000 hours using a CR123A 3V Lithium battery, this setup is designed to endure extended use, while its night vision compatibility enhances its functionality in low-light conditions. This optic combination is commonly found in mid-length gas system builds chambered in 5.56 NATO, making it an ideal choice for a variety of applications.
EOTECH EXPS3-4 HWS and G45 Magnifier ranks #14 of the 203 optics builders have added on GunPartPicker so far in September 2026, behind the Sightmark Mini Shot A-Spec M2 Red-Dot Sight 1x23MMX16mm - Precision 1 MOA Dot Reflex Sight for Enhanced Accuracy - SM26047, with about 2% of all optics added to builds. Up from #26 in August. Builds with this optic are mostly chambered in 5.56 NATO (88%, then 300 Blackout 13%), split between carbine-length (50%) and pistol-length (17%) gas systems, and mostly AR-15 (86%, then AR-10 14%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 3 retailers we track have it in stock. The best price drifted down from $1,459 to $1,315 over August 2026 without a real sale. Buying today, the lowest price is $1,459 at Primary Arms, above August's low of $1,315, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
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:
The part most often added in each category by the 83 builds that include this one
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Bravo Company Manufacturing 5.56 NATO Mid-Length Bhf AR-15 Barreled Upper - MCMR-15 - 16"
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SilencerCo Velos LBP 556 Rifle Suppressor, Black
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the EOTECH EXPS3-4 HWS and G45 Magnifier
| Build | Parts | Total |
|---|---|---|
 | 29 | $7219.05 |
 | 19 | $2914.54 |
 | 24 | $3855.19 |
 | 17 | $6764.96 |
 | 14 | $6600.31 |
2 global ratings
Top reviews
EOTECH EXPS3-4 with G45 magnifier has excellent glass but the eye box is tighter than my red dot - takes a moment to find the reticle at speed. The G45 5x magnifier is sharp. Worth the cost for medium range engagement work.
EOTECH EXPS3-4 with G45 magnifier works correctly but zero shifted a touch after the first range session. Re-zeroed and its held since. Glass at 4x with G45 is sharp. Battery life is good. Solid premium hybrid setup.
