- Comes with a Picaitnny mounting plate. Also comes with ADE all new designed adapter plate is to REPLACE the rear sight for Steyr A1 A2 Handgun
- This Optic Plate is Compatible with S-A1 C-A1 M-A1 L-A1 M9-A1, L9-A2, C9-A2, M9-A2. Does NOT fit any other models that is not listed here.
Manufacturer Model ADE RD3-013
The red dot is Compatible with Optic Cut/Plate/Slide that is made to accept Doctor/Vortex Venom/Burris Fastfire
- New advanced battery technology gives up to 2000 hours on bright setting and up to 30k hours on Low setting with a 1632 Battery(Included). Top load system, no need to remove the sight to change the battery.
- Red dot DOES NOT auto power off. It stays on until you manually power off. This means if the user does not power off the red dot, a single battery will last for a year. It has multi brightness level with one adjustment button. to turn the brightness up and one adjustment button to turn the brightness down. Hold the UP Arrow to power on. Hold the Down Arrow button to power on/off.
- Every time you turn on the dot it stays the same b rightness level last time it was turned off. The lowest setting is invisible by human eye that is for using with a Night Vision. Come with a mounting plate for picatinny rail. Additional mounting plates for handguns sells separately.
- 4 MOA dot, light and compact. 1.75" Length x1.25" Width x1.15" Height. Shock proof Fog proof and Waterproof for 30 minutes under 4ft water. Feature 1 M.O.A wind age and elevation adjustments with audible click
- Comes a battery, lens cloth, screws, picatinny mounting plate, instruction paperwork
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Below are additional footprint about ADE footprints.
ADE, RD3-006 Huracan,RD3-009 Crusader,RD3-012 Delta, RD3-013 Bertrillium fit optic cut/plate that is compatible with Vortex Venom/Burris Fastfire/Doctor footprint. RD3-015 Zantitium, RD3-028 Ares fit plate(does NOT fit slide due to larger size) that is compatible with Vortex Venom/Burris Fastfire/Doctor footprint. Please note: Some aftermarket slides have a precise optic cut based on the curved edge/corner of Vortex Venom, one of the common slide manufacturers is PSA Dagger(with Doctor cut). ADE and other brand red dots do NOT have the same curve as Vortex Venom, therefore ADE RD3-006, 009, 012, 013 do NOT fit the aftermarket slide with CURVED vortex venom optic cut. ADE red dots with Doctor footprints only fit squared optic cuts that accept standard Doctor Footprints.
ADE RD3-018 Spike, RD3-021 Nuwa and RD3-030 Apollo fit optic cut/optic plate that is compatible with shield RMS/RMSC/Deltapoint Pro footprint
ADE RD3-021c NUWAcc fits optic cut/optic plate/ that is compatible with Trijicon RMRcc footprint
ADE RD3-019 Stingray RD3-020 Raptor, RD3-023 Valkyrie and RD3-029 Trumpet fit optic cut/optic plate/ that is compatible with Trijicon RMR/SRO/Holosun 407C/507C footprint
12 Reviews Hide Reviews Show Reviews
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Practical and Dependable
This Bertrillium RD3-013 gives me exactly what I wanted — a simple red dot that’s easy to use and dependable. Adjustments are predictable and the dot stays clear even at longer pistol distances.
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Good Everyday Carry Setup
Mounted this optic on my carry gun with the Steyr plate. The dot holds zero well and is visible in different light conditions. Easy install and feel like a “real” reflex sight without spending big money.
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Great First Red Dot
This is my first red dot and I’m impressed. It’s unobtrusive on the slide and the 4 MOA reticle is perfect for quick target acquisition without getting in the way of the sight picture.
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Clear Reticle, No Fuss
I really like the simplicity of this optic. No motion sensor gimmicks, just a clear dot that stays put. Installation on the plate was smooth and it looks clean on the slide.
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Reliable and Rugged Enough
Had this out in a light rain and it didn’t fog or falter — good weather resistance for the price. The mount sits solid and feels rugged enough to handle regular range sessions.
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Battery Life Seems Excellent
I haven’t had to change the battery yet and I’ve been using this regularly for a month. Top-load battery access is super convenient — no need to take the sight off the gun to swap cells.
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Bright Dot, Easy Adjustments
Dot brightness is easy to dial in and stays consistent. The up/down buttons for brightness are intuitive and I like that the setting stays remembered. Good sight for everyday use on a Steyr pistol.
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Holds Zero Through Recoil
Put this on my Steyr and after several magazines of hot loads, the dot hasn’t drifted a bit. Very happy with how stable the mount is. Clear glass and reliable performance make this a good budget option.
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Dot Visibility Is Impressive
I shoot mostly outdoors, and the 4 MOA reticle stays visible without being too big. I like that it doesn’t power off automatically — you know exactly what brightness you’ll get each time you turn it on. Fit and finish feel solid.
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Clean, Simple Installation
Installed this red dot and plate in about 15 minutes with basic tools. Dot is clear and adjustments are crisp. I’m not a competitive shooter, but for range days and defensive drills this sight is more than enough.
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Great Reflex Sight at This Price
I wasn’t sure what to expect at this price point, but this Bertrillium red dot performs well. Dot brightness levels cover most lighting conditions, and battery life seems better than most entry-level optics I’ve owned. Mounting on my Steyr A2 was straightforward.
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Works Beautifully on My Steyr A1
I installed this RD3-013 with the Steyr A1 plate and it was super simple. The 4 MOA dot pops in daylight and is really easy to pick up on steel targets up to 50 yds. Zero stayed solid after a few hundred rounds. Easy install and great value.
