Are you fast up close but losing targets past a hundred yards? That is the tradeoff every red dot shooter makes, and a flip-to-side magnifier is how you get out of it. The EOTech G33 is the magnifier EOTech built to sit behind its own holographic weapon sights, and it does exactly one job well.
The G33 is a 3x magnifier on a Switch-to-Side (STS) mount. Leave it inline behind your sight for magnified shots, then flip it out of the way with a tap when the target closes in and you need a true 1x, both-eyes-open picture.
In this review of the EOTech G33, we will cover the top features, specifications, pros and cons, and what other shooters say about pairing this magnifier with their red dot and holographic sights.
EOTech G33 Magnifier Review
The G33 measures 3.9 inches long, 2.2 inches wide, and 3.3 inches tall, and weighs 11.2 oz with its Switch-to-Side mount installed. It has a generous 7.3-degree Field of View (FOV) for a magnifier and 2.2 inches of eye relief. There is no reticle, no battery, and no electronics. A magnifier is a purely optical device that magnifies whatever sight picture sits in front of it. The adjustable diopter lets you focus the image to your own eyesight, and the unit is water-resistant to 33 feet and fog-resistant across an operating range of -40 to 140 degrees Fahrenheit. Manufacturer Suggested Retail Price (MSRP) sits around $679.
EOTech Inc., a subsidiary of defense contractor L3Harris, is best known for the holographic weapon sights it builds for military and law enforcement. The G33 is the third-generation member of that G-series magnifier line, and it is designed to drop in behind EOTech holographic sights (though it works just as well behind a quality red dot sight) to turn a close-quarters optic into a flexible close-to-intermediate setup.
Top Features of the EOTech G33 Magnifier
Design
The G33 housing carries the same rugged, non-reflective rubber-armored finish you expect from EOTech, sized to sit low and tight behind a primary optic. At 3.9 inches long, 2.2 inches wide, and 3.3 inches tall, and 11.2 oz on its Switch-to-Side mount, it is a compact package for a 3x optic. Like any magnifier, though, it does add real weight and length behind your sight.
The unit is water-resistant to a depth of 33 feet (10 meters) and fog-resistant, rated to operate from -40 to 140 degrees Fahrenheit. That weather sealing matters on a magnifier just as much as on the sight in front of it. A fogged or leaking magnifier blacks out your whole picture, not just the reticle.
The lenses carry an anti-reflective coating to cut glare and keep the magnified image bright and clear. Because the G33 magnifies whatever is in front of it, glass quality and coatings are doing the heavy lifting here, and EOTech glass holds up.
Reticle
The G33 has no reticle of its own. It simply magnifies whatever sight picture your red dot or holographic sight is already producing, so reticle behavior under magnification depends entirely on the sight in front of it.
One genuinely useful detail of pairing a magnifier with an EOTech holographic sight: the holographic reticle keeps its true size under magnification. A 1 Minute of Angle (MOA) dot stays 1 MOA behind the G33 rather than growing 3x like a magnified Light Emitting Diode (LED) dot would. That keeps the aiming point fine and precise at distance, which is exactly what you want when you reach out.
The G33 delivers 3x magnification, which is the long-running sweet spot for a flip-to-side magnifier, and I think it is the right call here. It is enough to positively identify and engage targets out to a few hundred yards, but not so much that a narrowed field of view and reduced eye relief make it slow or finicky behind a 1x sight. The wide 7.3-degree FOV and 2.2 inches of eye relief make it easy to get behind the optic and stay oriented on target.
Operation
There is no power switch, no brightness control, and no battery to keep alive. The G33 is a passive optic. The one control that matters is the adjustable diopter ring, which you turn to bring the image into crisp focus for your eyes. Set it once for your vision and you are done.
In use, the workflow is simple: leave the G33 flipped inline behind your sight for magnified shots, and flip it to the side when a target closes in and you want a clean, unobstructed 1x picture. The flip is fast enough to do on the move without taking the rifle off your shoulder.
Mounting
The headline feature is the Switch-to-Side (STS) mount. Rather than removing the magnifier entirely or leaving it permanently inline, the STS mount lets you push the G33 to flip out of the optical path with a quick tap, then snap it back inline when you need magnification. It is spring-assisted and locks positively in both positions.
The mount fits a 1 inch Weaver or MIL-STD-1913 (Picatinny) rail, and it is height-matched to sit in line with EOTech holographic sights for proper reticle alignment. Height matching is where a lot of magnifiers fall short when paired outside their own brand, so if you are pairing the G33 with a non-EOTech red dot sight, make sure your sight sits at a compatible height (lower 1/3 or absolute co-witness) so the reticle lines up centered in the magnified image.
Details
Included with your purchase:
- G33 3x magnifier
- Switch-to-Side (STS) mount
- 7mm riser
- Four mounting screws
What Reviewers Say
Independent reviewers have run the G33 through months of field use, including live fire, rain, and dust, with no functional issues beyond minor cosmetic scratches, and they report no zero shift after adding it to an already-zeroed host sight. The glass consistently earns praise as bright, clear, and sharp with a generous eye box, with the one recurring optical caveat being slight darkening toward the very edge of the field of view. The Switch-to-Side mount is reported to lock up tightly and return to alignment reliably. The G33 is also the only magnifier under USSOCOM contract and EOTech’s most fielded magnifier, a strong signal of durability even though no independent tester has published a formal drop or submersion torture test on the unit itself.
Conclusion
The EOTech G33 is a no-nonsense magnifier that does its job and does it well. I like that it will not surprise you with gimmicks: good glass, 3x magnification, an adjustable diopter, and a fast, positive Switch-to-Side mount, all built specifically to live behind EOTech holographic sights. For anyone in that ecosystem who wants to reach past close-quarters distances without giving up a fast 1x picture, it is the obvious answer.
Alternative(s)
If the G33’s price is more than you want to spend on a magnifier, consider a dedicated prism optic instead. The Vortex Spitfire 3x gives you fixed 3x magnification with an etched reticle in one self-contained unit, at a friendlier price point. And if you have not yet settled on the sight that goes in front of your magnifier, a large-window holographic like the Holosun HS510C or a proven micro red dot like the Aimpoint Micro T-2 both make excellent magnifier partners. For shooters building around EOTech from the ground up, pair the G33 with the EOTech EXPS3 and call it done. That is our number one recommendation for anyone chasing a fast 1x-to-3x carbine setup.
