Section 1: Introduction

For long-range target shooters, varmint hunters, and high-power airgun enthusiasts, a 6-24x magnification range is the gold standard for extended-range precision. It delivers a stable, wide field of view at 6x for mid-range target acquisition and zeroing, while offering extreme magnification at 24x for precise shot placement on small varmints and steel targets out to 800 yards. The ideal entry-level long-range scope needs to combine sharp, consistent optics at high magnification, adjustable parallax for error-free shooting at all distances, reliable tracking turrets, rugged recoil resistance, and user-friendly features — all at an accessible price point. That’s exactly what we engineered with the DiscoveryOpt MS 6-24X42AOAC SFP-MOA-L 25.4MM Optics Scope.

Built as our core entry-level long-range optic for precision target shooting and varmint hunting, this scope pairs an ultra HD fully coated optical system with a 6-24x magnification range, second focal plane (SFP) MOA reticle, 42mm objective lens, rugged 25.4mm (1-inch) main tube, locking turrets with zero stop/reset, and red/green dual-color illuminated reticle. Its signature AOAC adjustable objective parallax system delivers sharp focus from 10 yards to infinity, eliminating parallax error for consistent accuracy at every distance. It’s purpose-built to withstand the recoil of 5.56 NATO and similar calibers, while also performing flawlessly on high-power springer and PCP airguns for long-range airgun target shooting. With IP66 waterproof protection, nitrogen-purged fogproof design, and a balanced 553g build, it’s ready for the harshest outdoor conditions and extended-range shooting sessions.

We put this scope through intensive real-world testing: 1000+ rounds of long-range target shooting at 100-800 yards, prairie dog and varmint hunting sessions, high-power airgun precision practice, and exposure to rain, wind, and rapid temperature changes. In this review, we share 100% factory-verified specs and honest field-tested performance, so you know exactly if this 25.4mm long-range scope is the right choice for your precision shooting or hunting setup.

Section 2: Core Verified Specifications At a Glance

Core Specification	MS 6-24X42AOAC SFP-MOA-L
Model	MS 6-24X42AOAC SFP-MOA-L
Magnification Range	6x – 24x
Focal Plane	Second Focal Plane (SFP)
Objective Lens Diameter	42mm
Main Tube Diameter	25.4mm (1-inch)
Click Value	1/4 MOA (0.25 MOA) Per Click
Total Elevation Adjustment	60 MOA
Total Windage Adjustment	60 MOA
Reticle Illumination	YES (Red/Green Dual-Color, 6 Brightness Settings)
Eye Relief	3.1in (7.8cm) @6x – 2.8in (7.0cm) @24x
Parallax Adjustment	AOAC Adjustable Objective, 10 Yards – Infinity
Field of View (100 Yards)	20.5 FT (6.2m) @6x – 5.2 FT (1.6m) @24x
Exit Pupil	6.8mm @6x – 1.7mm @24x
Overall Length	14.3in (362mm)
Weight	19.6 oz (553g)
Recoil Rating	5.56 NATO Compatible / Spring Airgun Certified
Protection Rating	IP66 Waterproof, Nitrogen-Purged Fogproof, Shockproof
Battery	CR2032
Turret Feature	Locking Turrets, Zero Stop and Zero Reset
Optical Glass	Ultra HD Glass, Ultra-High Light Transmission

Section 3: Key Features & Field-Tested Performance

3.1 6-24x Versatile Magnification: Built for Long-Range Precision & Varmint Hunting

The 6-24x magnification range is purpose-built for extended-range shooting, offering the perfect balance of mid-range versatility and extreme long-range magnification for small targets.

• At 6x low magnification, the scope delivers a stable 20.5 FT field of view at 100 yards, ideal for initial target acquisition, zeroing your rifle, and tracking moving varmints at mid-range. The wide FOV makes it easy to find and line up on targets quickly, even in open prairie or field environments where targets can be hard to locate.

• At 24x maximum magnification, the ultra HD optical system maintains crisp, clear clarity on small targets up to 800 yards, with well-controlled distortion and chromatic aberration. This extreme magnification is perfect for precision shot placement on tiny varmints like prairie dogs, ground squirrels, and crows, as well as for ringing steel targets at extended ranges.

• The smooth zoom ring features positive detents, allowing for precise, incremental magnification adjustments between 6x and 24x without accidental shifts. Whether you’re dialing up magnification for a long-range shot or dialing back for a moving target, the zoom mechanism operates smoothly and consistently, even in cold or wet conditions.

3.2 SFP MOA Reticle with Red/Green Illumination: Adaptable to All Light Conditions

The MS 6-24X42AOAC features a second focal plane (SFP) MOA reticle with red/green dual-color illumination, designed for precision holdovers and adaptability to any lighting scenario.

• The SFP MOA reticle stays fixed in size at all magnification levels, delivering a clean, uncluttered sight picture with consistent MOA hash marks for windage and elevation holdovers. This is ideal for long-range target shooting, as the reticle remains easy to read and reference at every magnification, with a thin center crosshair for precise aiming on small targets.

• The red/green dual-color illumination offers 6 adjustable brightness settings, calibrated for every lighting scenario — from bright midday sun to fading twilight and low-light dawn. The illumination is crisp and clear, without washing out the target or surrounding environment, making it perfect for early-morning and late-evening varmint hunts where light is limited.

• The etched glass reticle works even without power, ensuring you can still use the scope for precision shooting if the battery runs out. The common CR2032 battery is easy to source and replace, with long battery life even with regular use of the illuminated reticle.

3.3 AOAC Adjustable Objective Parallax: Sharp Focus & Error-Free Shooting from 10yd to Infinity

The signature AOAC (Adjustable Objective AO Correction) system is the standout feature of this scope, eliminating parallax error and delivering sharp focus at every shooting distance from 10 yards to infinity.

• The adjustable objective parallax ring is smooth and easy to operate, with clear distance markings for quick reference. Parallax error is the #1 cause of missed shots at long range, and this system lets you dial in perfect focus for any distance, ensuring your reticle and target are on the same optical plane for consistent accuracy.

• The 10-yard minimum parallax setting makes it ideal for high-power airgun shooters, who often shoot at close to mid-range targets (10-100 yards) with precision air rifles. The infinity maximum setting is perfect for long-range target shooting and varmint hunting at extended distances.

• Whether you’re shooting at a 10-yard airgun target, a 200-yard prairie dog, or an 800-yard steel plate, the AOAC system ensures a crisp, parallax-free sight picture, helping you achieve the most accurate shots possible at every distance.

3.4 Locking Turrets with 1/4 MOA Clicks: Precise & Repeatable Long-Range Adjustments

Precise, repeatable turret adjustments are non-negotiable for long-range precision shooting, and the MS 6-24X42AOAC delivers with locking turrets and crisp 1/4 MOA clicks optimized for extended-range use.

• The 1/4 MOA click value delivers precise, repeatable adjustments, with tactile, audible clicks that let you count your adjustments without looking at the turrets. This is critical for long-range shooting, where even small adjustments can make a huge difference in shot placement at extended distances.

• The locking turrets prevent accidental adjustments during transport, rough handling, or recoil — a common issue with non-locking turrets that can throw off your zero mid-hunt or shooting session. Once you’ve sighted in the scope, simply lock the turrets to keep your settings secure, with a quick-release design for easy adjustments when dialing for long-range shots.

• With 60 MOA of total elevation and windage adjustment, the scope easily accommodates a wide range of calibers and loads, from airgun pellets to 5.56 NATO, with plenty of adjustment for zeroing and long-range ballistic holdovers.

• The zero stop and zero reset feature allows you to reset the turrets to zero after sighting in, making it easy to track your dialed adjustments and return to your original zero quickly — an essential feature for long-range precision shooting.

3.5 Ultra HD Fully Coated Optics: Clear, Sharp Vision at Every Magnification

The MS 6-24X42AOAC features ultra HD glass with a fully coated anti-reflective optical system, optimized for maximum light transmission and sharp clarity across the entire 6-24x magnification range.

• The fully coated anti-reflective lenses reduce glare and maximize light intake, delivering a bright, clear sight picture even at maximum 24x magnification and in low-light conditions. This is especially important for varmint hunting, where you’ll often be shooting in the low-light dawn and dusk windows when varmints are most active.

• The ultra HD glass minimizes chromatic aberration (color fringing) and distortion, even at 24x maximum magnification. This ensures sharp, true-to-life images with crisp detail, so you can clearly identify small targets and make precise shot placement decisions at extended ranges.

• The 42mm objective lens balances light transmission and a compact profile, providing ample light intake for low-light shooting without adding excessive bulk or weight to your rifle setup. The 6.8mm exit pupil at 6x magnification delivers excellent eye position forgiveness, making it easy to acquire a full sight picture quickly when zeroing or acquiring moving targets.

3.6 Rugged 25.4mm Monotube Construction: Shockproof & Weatherproof for Field Use

Built to withstand the rigors of regular long-range shooting and backcountry varmint hunting, the MS 6-24X42AOAC features a rugged 25.4mm one-piece aluminum monotube construction that balances strength, durability, and balanced weight.

• The 25.4mm (1-inch) main tube is the industry standard, making it compatible with the vast majority of scope rings and mounts on the market, giving you endless options for customizing your rifle setup. It delivers excellent rigidity and stability, which translates to consistent tracking and repeatable performance under recoil.

• The scope is IP66 waterproof, meaning it can withstand high-pressure water spray and temporary submersion, making it ideal for hunting in rain, snow, or wet field conditions. We tested the waterproof rating by spraying the scope with high-pressure water for 10 minutes, with zero water intrusion or internal fogging.

• The nitrogen-purged tube is 100% fogproof, even during rapid temperature changes — we left it overnight in freezing temperatures, then moved it directly to a warm indoor environment, with zero internal fogging.

• The shockproof design is rated for 5.56 NATO recoil and certified for high-power spring airguns, and we tested it on multiple bolt-action varmint rifles, AR-platform rifles, and high-power airguns with zero failure or zero shift after 1000+ rounds. The matte black, non-reflective finish reduces glare and prevents reflections that could spook varmints.

• At 19.6 oz (553g), it’s perfectly balanced for long-range rifle setups, adding minimal weight while maintaining the rigidity needed for consistent precision, even during all-day shooting sessions.

Section 4: Ideal Use Cases

This scope is perfectly optimized for:

• Long-Range Precision Target Shooting: Ideal for recreational and competitive target shooting from 100 to 800 yards, with precise turret adjustments and sharp optics at maximum magnification.

• Varmint & Small Game Hunting: Perfect for prairie dogs, ground squirrels, crows, and other small varmints at extended ranges, with 24x magnification for precise shot placement and AOAC parallax adjustment for every distance.

• High-Power Airgun Shooting: Compatible with springer and PCP airguns, with a 10-yard minimum parallax setting perfect for airgun target shooting and pest control at close to mid-range distances.

• Farm & Ranch Pest Control: Versatile 6-24x magnification works for eliminating rodents and pest animals at both close and extended ranges on farms and ranches.

• Recreational Long-Range Plinking: The perfect entry-level scope for shooters getting into long-range shooting, with user-friendly features and consistent performance at an accessible price.

• 5.56 NATO / .223 Rem Varmint Rifles: Fully recoil-rated for modern sporting rifles and bolt-action varmint calibers, making it a great choice for dedicated varmint hunting builds.

 

Section 5: Who This Scope Is (And Isn’t) For 

5.1 Perfect For You If:

• You are a long-range target shooter or varmint hunter needing a 6-24x scope with adjustable parallax for precision at extended ranges.

• You are a high-power airgun enthusiast looking for a scope with a 10-yard minimum parallax setting for airgun target shooting and pest control.

• You use a 5.56 NATO / .223 Rem varmint rifle and need a scope that can withstand recoil and deliver consistent long-range performance.

• You are an entry-level long-range shooter looking for an affordable scope with premium features like locking turrets, zero reset, and dual-color illumination.

• You prefer a second focal plane (SFP) MOA reticle for a clean, consistent sight picture at all magnifications.

5.2 Not The Best Fit If:

• You are a close-quarters tactical shooter or 3-gun competitor needing a low-power variable scope for fast target acquisition — our MS 2-10X40IR is a better choice for this use case.

• You want a first focal plane (FFP) reticle for consistent MOA holdovers at every magnification — our HT series FFP scopes are a better fit for this application.

• You are an extreme long-range shooter targeting 1000+ yard targets — we recommend our higher-magnification LHT or LHD series scopes for extreme long-range use.

• You prefer side parallax adjustment (SF) over adjustable objective (AO) — our MS 4-16X44SFIR features side focus parallax adjustment for your needs.

Section 6: Frequently Asked Questions (FAQs)

1.Q: Is this scope a first or second focal plane (FFP/SFP) scope?

A: This scope features a second focal plane (SFP) reticle, which stays fixed in size at all magnification levels for a clean, consistent sight picture.

2. Q: What does AOAC mean?

A: AOAC stands for Adjustable Objective AO Correction, which is the scope’s adjustable objective parallax system. It lets you dial in sharp focus and eliminate parallax error for any shooting distance from 10 yards to infinity.

3. Q: What is the parallax adjustment range of this scope?

A: The parallax adjustment range is 10 yards to infinity, via the adjustable objective ring on the front of the scope.

4. Q: What size scope rings do I need for this scope?

A: This scope has a standard 25.4mm (1-inch) main tube, so it is compatible with all standard 1-inch scope rings and mounts.

5. Q: Does the reticle have illumination? What are the settings?

A: Yes, the reticle features red/green dual-color illumination, with 6 adjustable brightness settings calibrated for all lighting conditions from bright sun to low-light dawn/dusk.

6. Q: Is this scope waterproof and fogproof?

A: Yes, it is IP66 waterproof and nitrogen-purged fogproof, making it suitable for use in rain, snow, and rapid temperature changes.

7. Q: What battery does the illuminated reticle use?

A: The illuminated reticle is powered by a common CR2032 battery, which is easy to source and replace.

8. Q: Is this scope compatible with 5.56 NATO rifles and high-power airguns?

A: Yes, it is recoil-rated for 5.56 NATO and certified for high-power spring airguns, with a shockproof design that stands up to heavy recoil.

 

Section 7: Package Includes

• DiscoveryOpt MS 6-24X42AOAC SFP-MOA-L 25.4MM Optics Scope

• Scope Sunshade

• Flip-up Lens Caps

• Lens Cleaning Cloth

• Scope Coin (for turret and objective adjustments)

• User Manual & Spec Card

• Warranty Card & QC Inspection Card

 

Section 8: Final Verdict

After intensive field testing, 1000+ rounds of long-range shooting, side-by-side comparisons with competing entry-level long-range scopes, and real-world varmint hunting and airgun use, our verdict is clear: the DiscoveryOpt MS 6-24X42AOAC SFP-MOA-L is the best value entry-level long-range scope on the market in 2026, offering precision features, consistent high-magnification performance, and rugged reliability at an unbeatable price.

It delivers on every promise of a high-quality long-range scope: a versatile 6-24x magnification range perfect for varmint hunting and target shooting, an AOAC adjustable objective system that eliminates parallax error from 10 yards to infinity, precise locking turrets with zero reset, and bright, clear ultra HD optics that stay sharp even at maximum 24x magnification. The red/green dual-color illuminated reticle adds versatility for low-light hunting, while the standard 25.4mm tube offers endless mounting compatibility, and the rugged IP66 build stands up to the harshest field conditions.

If you’re an entry-level long-range shooter getting into extended-range target shooting, a varmint hunter needing consistent precision at extended distances, or a high-power airgun enthusiast looking for an affordable precision scope, the MS 6-24X42AOAC SFP-MOA-L is our top recommendation for 2026.

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