Triton Nautilus2 ERD Enclosed Red Dot Sight
Fully enclosed optic with an RMSc footprint and side-access battery. Choose Standard ERD or Multi-Reticle.
ENCLOSED DESIGN. EVERYDAY PRACTICALITY.
A protected emitter and motion activation in a CNC-machined aluminum housing. Choose a 3 MOA red dot or the Multi-Reticle version.
Enclosed emitter · Shake Awake · Side-access battery
RMSc MOUNTING PATTERN
Both reticle versions share the same mounting pattern. Match your exact slide or adapter plate and hardware. Browse compatible makes and models.
Standard ERD and Multi-Reticle use the same RMSc mounting pattern. Reticle selection does not change the mounting footprint.
View the full Nautilus2 handgun compatibility guide. Match your exact optics-ready model, slide cut and hardware requirements. Where mounting patterns differ, confirm the appropriate adapter plate.
The emitter sits inside a protective housing, helping shield it from dust, lint, rain and debris that could obstruct an exposed emitter. The front and rear external lens surfaces still need to be kept clean.
The Nautilus2 ERD uses a side-access battery compartment. Reach the compartment from the side while leaving the optic mounted.
Listed battery life is up to 50,000 hours. Brightness, movement, temperature and battery condition affect actual runtime. Follow the battery instructions supplied with your ERD.
Nautilus2 ERD is backed by Triton’s lifetime warranty.
See the current shipping policy and return terms for processing, delivery and eligibility details.
WHY NAUTILUS2 ERD
A protected emitter and a battery you can reach from the side. Choose the Standard ERD’s 3 MOA red dot or the Multi-Reticle version with selectable aiming patterns.
TAKE A CLOSER LOOK
Explore the enclosed housing, side-access battery and everyday controls.
Product graphics illustrate features. The rain scene is illustrative, and the displayed dot is not a calibrated size simulation.
MULTI-RETICLE VERSION
A reticle is the illuminated aiming mark you see through the lens. Multi-Reticle lets you switch between different aiming patterns within the same enclosed optic.
Reticle selection changes the pattern. Brightness settings change how brightly it appears. Choose the version that suits your preferred sight picture.
Reticle previews and final pattern specifications coming soon.
BUY WITH CONFIDENCE
A quick compatibility check helps you confirm that Nautilus2 ERD matches your setup before ordering.
01
Identify your handgun’s exact model and generation, including any aftermarket slide.
02
Check the mounting specification in the slide or adapter-plate documentation.
03
Match the ERD’s RMSc footprint to your slide or adapter plate. Confirm the correct hardware for your exact setup.
04
Unsure about compatibility? Send Triton your exact setup before you order.
QUESTIONS BEFORE YOU BUY
The emitter sits inside a protective housing instead of being exposed. This helps shield it from dust, lint, rain and debris that could interrupt the dot. The exterior lenses still need routine cleaning.
A reticle is the illuminated aiming mark visible through the lens. Multi-Reticle lets you switch between different aiming patterns in the same optic. Brightness changes the intensity of the illumination; reticle selection changes the pattern.
The Standard ERD has a 3 MOA red dot. Choose the Multi-Reticle variant for selectable patterns. See the Multi-Reticle preview module.
Both ERD reticle versions use the same RMSc mounting pattern. Browse the full Nautilus2 make/model compatibility guide below, then confirm your exact optics-ready model, slide configuration, plate and mounting hardware.
Ask Triton if you are unsure about your combination.
No adapter is needed when your slide has the matching direct-mount pattern. If your slide and optic use different mounting patterns, an appropriate adapter may be required. Follow your slide or plate manufacturer’s compatibility guidance.
The ERD has a side-access battery compartment, allowing access while the optic remains mounted. Use the instructions supplied with your ERD for the correct battery and replacement procedure.
Nautilus2 ERD has 10 brightness settings, including a daylight-rated maximum, controlled by side-mounted plus and minus buttons. Shake Awake activates illumination with movement and automatic sleep conserves power when idle.
Listed runtime is up to 50,000 hours. Actual battery life varies with brightness, movement, temperature and battery condition.
The CNC-machined 6061-T6 aluminum housing is rated IP64. Its enclosed design helps protect the emitter from debris and rain, while anti-reflective and hydrophobic lens coatings help reduce glare and shed water. IP64 is not an immersion rating.
Production batches receive a batch control number and undergo recoil-simulation testing based on a .50 BMG impulse profile.
For model-specific instructions or compatibility help, contact Triton support. Nautilus2 ERD is backed by Triton’s lifetime warranty.
FROM DETAILS TO DEMONSTRATION
Product walkthroughs and a closer look at the enclosed design. Coming soon.
The Nautilus2 make/model guide, organized by mounting pattern. Standard ERD and Multi-Reticle share the same RMSc mounting pattern.
ERD-NAU-RS-2 / ERD-NAU-RS-2-M
Type B OR/OSR / Type D OR/OSR
PD10
BP9CC OR
Mete MC9 / Mete SF / Mete SFT / Mete SFT Pro / Mete SFX
Reflex MRD
43X MOS / 48 MOS
Witness 2311
Masada Slim
R7 Mako OR / R7 Mako TFS / R7 Mako Carbon Compact / CDS9 / KDS9c
Beretta Tomcat RDO
MC2sc Optic Ready
5.7 Rock Optics Ready / Dagger Micro
STK100
MAX-9 / 5.7 Optics Ready
SAR9 Subcompact Gen2 / SAR9 Compact Gen3 / SAR9 Gen3 / SAR9 Sport Gen3 / SAR9 SOCOM
CPX-1 RDR / CPX-2 RDR / CPX-3 RDR / CPX-4 RDR / DVG-1 RDR
CR920 Combat / Elite /CR920P
P322 / Comp / P365-380 / P365 Optic Ready / P365X / P365XL / P365-XMACRO / Comp / P365-AXG Legion
M&P 22 Magnum Performance Center / M&P Shield M2.0 OR / M&P Shield Plus OR / Equalizer
Hellcat OSP / Hellcat RDP / Hellcat Pro / XD-S Mod.2 OSP
STR-9MC
TX 22 Compact / GX4 TORO / GX4XL / GX4 Carry TORO / Defender 856 TORO / 327 TORO / 605 TORO / Judge TORO / Magnum Judge TORO
Carry Double Stack / Duty Double Stack / Night Stalker / Double Stack SF
Confirm slide or adapter compatibility
Reflex MRD / Reflex XL MRD
43X MOS-K
CC9 Optics Ready / CC9 Optics Equipped
Masada Slim / Masada Slim Elite / Masada Slim Commander Elite
R7 Mako Tactical
Dagger Micro / Dagger Micro C-1 / Dagger Micro X-1
MAX-9 Optics Ready
CR920 / CR920 Elite / CR920P / CR920X / CR920XP
P365-380 Optics Ready / P365 Optics Ready / P365X / P365XL / P365-XMACRO / P365-XMACRO Comp / P365 FUSE / P365 AXG Legion
M&P Shield X / Performance Center Shield X Carry Comp / CSX E-Series 3.1" / CSX E-Series 3.6"
TX22 Compact
Match the exact optics-ready version and confirm your slide or adapter plate and mounting hardware. K-Series entries are a mounting reference; confirm compatibility with the ERD’s RMSc pattern. Reticle selection does not change fit.
