Alpen Optics Argus LT Red Dot 1x20x18 Red Dot Sight – Closed design for maximum protection and precision
When reliability is key: the closed Argus LT Red Dot with DynamicDot technology
Imagine this: you are hunting from a blind when suddenly thick rain clouds roll in and raindrops start hitting your optics – now you need a sight that remains completely reliable, does not let moisture in and provides you with a crystal-clear target image despite adverse conditions. This is where the Alpen Optics Argus LT Red Dot 1x20x18 excels: a closed red dot sight in a tube design that sets new standards with its robust design, innovative DynamicDot technology, and uncompromising weather resistance.
At Swiss-Sale.ch, we know that you need to be able to rely on your equipment – especially when conditions get tough. That's why we offer the Argus LT Red Dot 1x20x18, a premium red dot sight in a closed design that combines state-of-the-art technology with proven Alpen Optics quality – developed for hunters and sport shooters who demand maximum reliability.
Closed design: Maximum protection for your optics
The key difference between the Argus LT 1x20x18 and the open 1x26x23 model is its tube construction – a fully enclosed housing that protects the sensitive optics all around.
Why a closed design?
Optimal weather protection – The closed tube prevents rain, snow, dirt, or vegetation from entering the optics from the side. This all-round protection is invaluable, especially in strong crosswinds, snow drifts, or when hunting in dense undergrowth.
No stray light effects – The closed housing prevents light from entering from the side, which can cause annoying reflections or reduced contrast values in certain lighting situations with open red dots. You get a consistently clear, high-contrast target image – regardless of the time of day or the direction of light.
More robust construction – The tube design offers greater structural stability and protection against mechanical impact. The solid housing absorbs shocks, blows, or accidental collisions with branches.
Longer service life – Thanks to the improved protection of the electronics and optics against environmental influences, your sight will remain accurate and reliable for many years.
The compact tube design measuring 46 × 36 × 34 mm is surprisingly small and weighs only 110 grams – you benefit from maximum protection without unnecessary additional weight.
3 reticle options – Perfectly tailored to every hunting situation
Like its open brother, the Argus LT 1x20x18 offers three different illuminated reticles that you can flexibly adapt to your requirements:
3 MOA red dot – The fine, precise dot is ideal for accurate shots at medium ranges. At only 3 MOA (approx. 3 cm at 100 m), the illuminated dot does not cover your target and allows for surgical precision when stalking or in precision sport shooting.
32 MOA circle – The generous illuminated circle significantly speeds up target acquisition. Especially during driven hunts, when game suddenly changes direction, or in dense forest areas with limited visibility, the 32 MOA circle helps you find and enclose your target in a flash.
Circle with 3 MOA dot (combination) – This hybrid solution combines speed and precision: the outer circle allows you to quickly lock onto moving game, while the central dot guarantees precise shot placement. The perfect choice for dynamic hunting situations.
All three reticles have 10 adjustable brightness levels that are optimized for daytime hunting as well as twilight and night hunting. From the bright midday sun to dusk, you will always find the perfect setting for optimal visibility without glare.
DynamicDot technology: Intelligent energy management for 50,000 hours of operation
DynamicDot technology makes the Argus LT Red Dot one of the most efficient red dot sights on the market. A highly sensitive motion sensor automatically detects when your weapon is moved and activates the illuminated reticle in milliseconds.
How DynamicDot technology works:
- Weapon is moved → Motion sensor activated, illuminated dot switches on immediately
- Weapon at the ready → Full functionality, all brightness levels available
- 2 minutes without movement → Automatic standby mode (minimal power consumption)
- 24 hours in standby mode → Complete shutdown to conserve battery power
- Movement again → Immediate reactivation, even after days or weeks
The result: Up to 50,000 hours of battery life with a single CR1632 button cell. That's over 5.7 years in theoretical continuous operation or several years in practice with normal use.
Your everyday benefits:
- No more manual switching on and off
- The visor is always ready for use when you need it
- No more dead batteries at crucial moments
- Leave it mounted for months without worry
- Perfect for spontaneous hunting trips or quick missions
This intelligent energy management not only saves you money on batteries, but also valuable time and stress.
Compact 20x18 mm optics: Clear vision despite closed design
Despite its closed tube design, the Argus LT 1x20x18 offers a surprisingly large field of view thanks to its 20 × 18 mm front lens. The high-quality multi-coating ensures 80-85% light transmission and guarantees brilliant, high-contrast images.
The red coating on the front lens is not only visually striking, but also has practical advantages:
- Reduces reflections in the visible spectrum
- Improves contrast in difficult lighting conditions
- Minimizes stray light for clearer target images
- Characteristic optics with a professional appearance
At first glance, the closed design may suggest a smaller field of view, but thanks to the sophisticated optical construction and 1x magnification (no magnification = natural vision), you retain an overview and can aim with both eyes – for maximum situational awareness.
The twilight factor of 8.49 demonstrates the sight's good performance even in low light conditions. For a red dot sight without magnification, this is an excellent value that provides you with clear target images even at dawn and dusk.
Precise MRAD adjustment: 0.3 MRAD per click for millimeter-precise zeroing
The Argus LT Red Dot 1x20x18 features a precise click adjustment system with 0.3 MRAD per click. This corresponds to 3 cm at 100 meters and offers you the perfect balance between fine tuning and practical handling.
Adjustment range:
- Elevation adjustment: 88 clicks Adjustment range
- Side adjustment: 88 clicks adjustment range
- Total adjustment range: Sufficient for a wide range of calibers and operating distances
The metric MRAD system makes calculations child's play: at 200 meters, one click corresponds to 6 cm, at 300 meters it is 9 cm. This simple conversion allows for quick ballistic corrections even under stress.
The adjustment turrets are designed for easy handling and can be operated precisely even when wearing hunting gloves. Each click is tactile and audible – you always know exactly how many clicks you have adjusted. After zeroing, the turrets can be locked to prevent accidental adjustment.
6061-T6 CNC aluminum housing: Uncompromising robustness
The housing of the Argus LT Red Dot 1x20x18 is made of high-strength 6061-T6 aluminum, which is CNC-milled from a solid block. This manufacturing method guarantees maximum precision and material integrity – there are no weld seams or weak points.
Material properties of T6 6061 aluminum:
- High strength and lightweight – Optimal strength-to-weight ratio
- Corrosion resistant – Anodized surface provides lasting protection against oxidation
- Temperature stable – works reliably from -30°C to +50°C
- Shock resistant – Absorbs shocks and vibrations without deformation
- Durable – Decades of service life with proper care
The matte black anodization prevents light reflections and makes you inconspicuous in the field. Even after years of intensive use, the sight retains its professional appearance.
Weighing only 110 grams, the Argus LT 1x20x18 is surprisingly light despite its robust tube construction and hardly adds any weight to your weapon.
Waterproof to IPX7 and nitrogen-filled: indestructible in any weather
The Alpen Optics Argus LT Red Dot 1x20x18 is waterproof to IPX7 standard. Specifically, this means that the sight can withstand submersion to a depth of 1 meter for 30 minutes without moisture penetrating.
Practical examples of IPX7 reliability:
- Hunting in heavy and continuous rain
- Crossing streams and bodies of water
- Snowstorms and snow flurries
- Accidental dropping into water
- High humidity in fall and winter
The nitrogen filling in the housing also prevents the lenses from fogging up on the inside. Even in extreme temperature fluctuations—when you step out of a warm vehicle into the freezing cold winter air or vice versa—your view remains clear and sharp.
The high-quality O-ring seals remain elastic and reliable even at sub-zero temperatures. The separately sealed battery compartment even allows you to change the battery in the rain without moisture getting into the housing.
Shotproof up to magnum caliber: unbeatable stability
The Argus LT Red Dot 1x20x18 is designed for magnum calibers with a recoil of up to 1,000 g. This extreme shot resistance far exceeds the requirements of most hunters and sport shooters.
Suitable calibers (sample selection):
Rifle calibers:
- .223 Remington / 5.56×45mm NATO
- .243 Winchester
- 6.5×55 SE / 6.5 Creedmoor
- .308 Winchester / 7.62×51mm NATO
- .30-06 Springfield
- 8×57 IS
Magnum calibers:
- .300 Winchester Magnum
- 7mm Remington Magnum
- .338 Lapua Magnum
- .375 H&H Magnum
Shotguns:
- 12-gauge magnum loads
- Slug ammunition
Handguns:
- 9×19mm Luger / Parabellum
- .40 S&W
- .45 ACP
- .357 Magnum
- .44 Magnum
The internal shockproof mounting of electronics and optics absorbs even the hardest recoils without affecting the zero setting. Even after hundreds or thousands of shots, your red dot remains precisely calibrated.
Flexible mounting options: ACRO footprint and Picatinny
The Argus LT Red Dot 1x20x18 uses the ACRO footprint —a widely used industry standard for compact, enclosed red dot sights. This guarantees broad compatibility with a wide range of mounting bases.
Included in delivery:
- Low Picatinny mount – For low-profile mounting on long guns with Picatinny rails
- High Picatinny mount – For higher mounting position, ideal for co-witnessing with backup sights
- ACRO Footprint Adapter – Enables ultra-low mounting on handguns
Compatibility:
- Modern hunting rifles with Picatinny rail
- AR-15 / AR-10 and other MSR (Modern Sporting Rifles)
- Shotguns with Picatinny adapter or Weaver rail
- Pistols with ACRO milling (many modern models)
- Revolvers with appropriate mounting adapter
Tool-free mounting takes just a few minutes. Thanks to standardized interfaces, you can easily switch your Argus LT between different weapons.
Compact tube dimensions: maximum protection, minimum weight
With dimensions of 46 × 36 × 34 mm (L × W × H), the Argus LT 1x20x18 is one of the most compact closed red dot sights on the market. Despite its robust tube construction, it weighs only 110 grams (without mounting).
Advantages of the compact design:
- Low weight – the weapon remains easy to handle and can be swung quickly
- Good balance – the center of gravity of the weapon is hardly changed
- Long-lasting comfort – you will hardly feel the additional weight during hours of sitting
- Unobtrusive profile – does not snag on clothing or vegetation
- Space-saving – leaves room for additional accessories such as magnifiers
Despite its compact size, the closed design offers comprehensive protection and high-quality optical performance.
Who is the Alpen Optics Argus LT Red Dot 1x20x18 the perfect choice for?
This closed premium red dot sight was developed for users who demand maximum reliability under the toughest conditions:
All-weather hunters – Do you hunt in all weather conditions? Are rain, snow, and mud no obstacle for you? Then the enclosed Argus LT 1x20x18 is your ideal companion that never fails.
Hunters who use blinds – Hours spent in blinds in changing weather conditions require a sight that remains absolutely reliable. The closed design protects the optics from moisture and fogging.
Stalking hunters – When stalking through dense undergrowth, across wet meadows and through streams, the tube construction protects your optics from mechanical impact and moisture.
Driven hunters – Every second counts during a driven hunt. DynamicDot technology ensures that your sight is ready for use immediately when you need it.
Sport shooters (practical shooting) – Reliability and precision in all weather conditions – the enclosed Argus LT can handle even the most intense competition conditions.
Handgun shooters – With the ACRO footprint, the Argus LT can be easily mounted on modern pistols – ideal for tactical training or sport shooting.
Frequent shooters – Extreme shot resistance and durability make the Argus LT the perfect choice for intensive use at the shooting range or in the field.
Technical data at a glance
Optics:
- Magnification: 1x (no magnification, natural vision)
- Objective lens diameter: 20 × 18 mm (rectangular lens)
- Twilight factor: 8.49
- Reticle: 3 MOA red dot, 32 MOA circle, circle with 3 MOA dot
- Brightness levels: 10 (optimized for day and night hunting)
- Coating: Multi-coated – 80-85% light transmission
- Coating color: Red (characteristic brand feature)
- Eye relief: Infinite (any distance possible)
- Parallax compensation: Yes (parallax-free from 10 cm)
Mechanics & adjustment:
- Click adjustment: 0.3 MRAD (3 cm at 100 m per click)
- Elevation adjustment: 88 clicks adjustment range
- Side adjustment: 88 clicks adjustment range
- Mounting footprint: ACRO standard
- Mounting options: Low Picatinny, High Picatinny, ACRO adapter
Housing & material:
- Construction: Closed tube design (fully protected)
- Material: CNC-machined 6061-T6 aluminum
- Surface: Matte black anodized
- Dimensions (L × W × H): 46 × 36 × 34 mm
- Weight: 110 g (without mounting)
Resistance:
- Water resistance: IPX7 (1 m for 30 minutes)
- Protective gas filling: Nitrogen (fog-free)
- Shotresistance: Up to 1,000 g (magnum caliber)
- Temperature range: -30°C to +50°C
- Shockresistance: Mil-Spec standard
Electronics & battery:
- Battery type: CR1632 button cell
- Battery life: Up to 50,000 hours (with DynamicDot)
- DynamicDot technology: Automatic activation when movement is detected
- Standby mode: After 2 minutes of inactivity
- Automatic shutdown: After 24 hours in standby mode
Areas of application:
- Driven hunt, stalking, raised hide hunting
- All-weather hunting
- Sport shooting (practical shooting, IPSC)
- Tactical applications
- Handgun use (with ACRO adapter)
Scope of delivery – Complete package for immediate use
Included in delivery:
- Alpen Optics Argus LT Red Dot 1x20x18 red dot sight (closed)
- Low Picatinny mount
- High Picatinny mount
- ACRO footprint adapter
- CR1632 battery (already inserted)
- User manual (DE, EN, FR, ES, NL, IT, PL)
- Alpen Optics Deluxe warranty certificate
- Cleaning cloth
Everything you need for immediate installation and use – no additional purchases necessary.
Alpen Optics Deluxe Warranty: Your investment is protected
The Argus LT Red Dot 1x20x18 comes with the Alpen Optics Deluxe Warranty – a quality promise that goes far beyond statutory warranties.
Your warranty benefits:
- Extended manufacturer's warranty on material and workmanship defects
- Free repair service for manufacturer defects
- Fast support from the German Alpen Optics Service Center in Rhede
- Long-term spare parts supply guaranteed
- Accommodating handling in the event of a warranty claim
This extended warranty gives you the security of investing in a product that will serve you for many years to come.
Why buy the Alpen Optics Argus LT Red Dot 1x20x18 from Swiss-Sale.ch?
At Swiss-Sale.ch, you get premium quality with Swiss service standards:
✓ Authentic Alpen Optics original directly from an authorized dealer
✓ Fast shipping within Switzerland – delivered to you in just a few days
✓ Swiss customer service with hunting and sport shooting expertise
✓ Alpen Optics Deluxe warranty for long-term security
✓ Secure payment methods – your data is protected
✓ Fair pricing – quality doesn't have to be overpriced
Closed protection meets smart technology
The Alpen Optics Argus LT Red Dot 1x20x18 is the perfect choice for anyone looking for a robust, enclosed red dot sight with state-of-the-art technology. The tube design offers maximum protection against weather conditions and mechanical stress, while DynamicDot technology ensures 50,000 hours of battery life and immediate readiness for use.
With three flexible reticle options, precise 0.3 MRAD adjustment, IPX7 waterproofing, and magnum shot resistance, this red dot can handle any challenge. The CNC-machined 6061-T6 aluminum housing guarantees decades of reliability, while the nitrogen fill ensures fog-free vision at all temperatures.
Built for the toughest conditions, designed for maximum precision, developed for uncompromising reliability – the Argus LT 1x20x18 is your reliable partner when it matters most.
Trust in German engineering from Alpen Optics and Swiss service quality from Swiss-Sale.ch. Order your Alpen Optics Argus LT Red Dot 1x20x18 now and experience the performance of premium closed optics.
Frequently asked questions (FAQ)
What is the difference between the 1x20x18 and the 1x26x23 model? The 1x20x18 has a closed tube design that offers maximum protection against weather and stray light. The 1x26x23 has an open design and offers a larger field of view. Both have identical DynamicDot technology and reticle options.
Is the closed design heavier? Yes, but only slightly. The 1x20x18 weighs 110 g (vs. 70 g for the open model). The 40 g difference in weight is hardly noticeable, but offers significantly more protection.
Can I use the sight in heavy rain? Absolutely! The closed design with IPX7 waterproofing and nitrogen filling makes it perfect for all-weather use. Rain, snow, or splashing water cannot damage the optics.
Does the lens fog up when the temperature changes? No. The nitrogen filling prevents internal fogging even during extreme temperature fluctuations. The lenses always remain clear.
Which reticle is best for driven hunts? The 32 MOA circle or the combination of circle and dot are ideal. The large circle allows for the fastest target acquisition when hunting moving game.
Does the DynamicDot technology work reliably? Yes, the motion sensor is highly sensitive and reacts immediately. The sight switches on at the slightest movement of the weapon – you won't miss a single opportunity.
Is the sight suitable for left-handed shooters? Yes, the Argus LT is completely ambidextrous and is perfect for both left- and right-handed shooters.
Can I mount the sight on a pistol? Yes, with the included ACRO footprint adapter, the sight can be mounted on all pistols with ACRO milling.
How do I change the battery? The battery compartment is accessible from the side and can be opened without tools. Changing the battery takes less than a minute – even with gloves on.
Alpen Optics Argus LT Red Dot 1x20x18 – Closed protection for uncompromising precision.
Order now at Swiss-Sale.ch and experience its reliability!
