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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 #13 of the 246 optics builders have added on GunPartPicker so far in November 2026, behind the Trijicon ACOG 4x32mm Scope - Dual Illuminated Chevron - Red, with about 1% of all optics added to builds. Up from #17 in October. Builds with this optic are mostly chambered in 5.56 NATO (77%), split between mid-length (52%) and carbine-length (28%) 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 all 3 retailers we track have it in stock. It dipped to $1,315 at BattleHawk Armory for a stretch in October 2026, under its usual $1,459, so sales do come around. Buying today, the lowest price is $1,315 at BattleHawk Armory, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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:
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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 | $6965.46 |
 | 19 | $2781.04 |
 | 24 | $3669.15 |
 | 17 | $6739.71 |
 | 14 | $6488.40 |
1 global rating
Top reviews
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.
