SWFA SS 20x42 SFP MOA 30mm GEN 2 Rifle Scope
Extreme Magnification for Ultimate Precision For the absolute maximum in target resolution and long-distance precision, the 20x42 MOA stands completely alone in its class. This is an uncompromising optic built for ultra-long-range shooting, extreme rimfire precision, and benchrest applications where you need to see the tiny details of your target at several hundred yards. Paired with a matching MOA reticle, it gives traditional shooters fine-tuned adjustment capabilities. Thanks to the rugged 30mm Gen 2 construction, you get rock-solid tracking stability that variable-power scopes at double the price simply cannot match. - George
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The SWFA SS 20x42 SFP MOA 30mm GEN 2 Rifle Scope is precision-engineered for uncompromising performance in the harshest conditions. Built to NATO specifications, this scope thrives in temperatures from -45°C to +55°C, at 30,000 feet altitude, or 15 feet underwater, ensuring total reliability wherever your mission takes you. From a .223 to a .50 BMG, the SWFA SS GEN 2 can handle extreme recoil while maintaining zero integrity and optical clarity.
Crafted from lightweight yet incredibly strong aluminium, it features fully multi-coated lenses for exceptional light transmission and crisp image quality. The new Modular Turret System (MTS) with a built-in zero stop allows for full turret customisation, while the patented MOA-Quad reticle offers precise holdovers for long-range accuracy. Updated turret markings, parallax indicators, and revolution scales deliver enhanced field usability, making the SWFA SS GEN 2 the ultimate scope for precision shooters who demand absolute confidence in every shot.
- Magnification 20x
- Objective Lens Diameter 42mm
- Tube Diameter 30mm
- Reticle Type MOA-Quad
- Focal Plane Second
- Click Adjustment Value 0.25 MOA
- Adjustment per Revolution 15 MOA
- Total Elevation Adjustment 100 MOA
- Total Windage Adjustment 100 MOA
- Parallax Adjustment Range 10 yards – Infinity
- Parallax Adjustment Type Rear Focus
- Field of View @ 100 Yards 5.7 ft
- Eye Relief 3.4 in
- Length 14.1 in
- Weight 600 g
- Coating Fully Multi-Coated
- Finish Matte Black
- Waterproof Yes
- Fogproof Yes
- Shockproof Yes
- Recoil Rated Up to .50 BMG
- Construction Lightweight Aluminium
- Operating Temperature -45°C to +55°C
- Modular Turret System (MTS) – Allows for multiple turret combinations, including capped or exposed options, to suit any shooting application.
- Zero Stop Functionality – Integrated system ensures a reliable return to zero, vital for long-range precision and competitive use.
- Patented MOA-Quad Reticle – Engineered for precise range estimation, elevation, and windage correction in MOA increments.
- Enhanced Field Readability – Redesigned turrets and parallax markings for faster adjustments and better visibility in dynamic conditions.
- Superior Optical Clarity – Fully multi-coated lenses provide maximum brightness and resolution, even in low-light environments.
- All-Weather Endurance – Operates flawlessly between -45°C and +55°C, at high altitude or underwater, maintaining full performance integrity.
- Rear Focus Parallax Control – Smooth and precise adjustment from 10 yards to infinity for exact target focus.
- Rugged Construction – Machined from aircraft-grade aluminium, combining strength, stability, and reduced weight for ease of handling.
- SWFA SS 20x42 SFP MOA 30mm GEN 2 Rifle Scope
1. What is the main difference between the Gen 1 and the Gen 2 SWFA SS scopes?
The Gen 2 models feature upgraded optical coatings for improved light transmission, contrast, and clarity. Mechanically, they introduce redesigned, lower-profile turrets with crisper, more distinct tactile clicks, and slightly updated reticle options, all while maintaining the legendary "bombproof" reliability of the original line.
2. Why should I choose a fixed-power scope over a variable-power scope?
Fixed-power scopes offer three major advantages: mechanical simplicity (fewer moving parts to break under heavy recoil), optical clarity (fewer glass elements mean better light transmission at a lower price point), and consistently accurate reticle subtensions. Because it is a Second Focal Plane (SFP) scope, your reticle's holdovers are always 100% accurate because the magnification never changes.
3. What is the difference between the MOA and MQ models?
It comes down to your preferred system of measurement:
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MOA models use Minute of Angle adjustments (usually 1/4 MOA per click), which is ideal for traditional shooters who prefer thinking in inches (e.g., 1 inch at 100 yards).
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MQ (Mil-Quad) models use Milliradians (0.1 MRAD per click). The Mil-Quad reticle uses diamond shapes for highly precise holdovers and windage reads, which is favored by modern tactical and long-range precision shooters.
4. Do these scopes feature a parallax adjustment, and what is the minimum distance?
Yes, all SWFA SS 10x, 12x, 16x, and 20x models feature a rear-focus parallax adjustment ring (located right in front of the eyepiece). The parallax can be adjusted from 10 meters (approx. 11 yards) to infinity, making these scopes incredibly popular for everything from extreme close-range rimfire/airgun shooting to ultra-long-range centerfire shooting.
5. What size scope rings do I need to mount an SWFA SS scope?
All SWFA SS fixed-power scopes feature a heavy-duty 30mm main tube. You will need high-quality 30mm scope rings. The height of the rings (low, medium, or high) will depend on your specific rifle action and barrel profile, though the 42mm objective lens generally allows for medium or low mounting on most platforms.
6. Are these scopes rated for heavy recoil or spring-piston air rifles?
Absolutely. The SWFA SS line was originally designed to meet military contracts and is famous for its ruggedness. They are fully rated for heavy-recoil calibers (like .300 Win Mag and .50 BMG) as well as the unique, harsh bi-directional recoil of magnum spring-piston air rifles.
7. What magnification should I choose (10x, 12x, 16x, or 20x)?
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10x: Best all-rounder; versatile for hunting, tactical matches, and target shooting with a wider field of view.
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12x: The "sweet spot" for mid-to-long-range steel and varmint hunting.
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16x: Ideal for long-range target shooting and extreme-distance rimfire.
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20x: Best for dedicated benchrest, F-Class, or ELR (Extreme Long Range) shooting where maximum target resolution is required.
8. Are the turrets resettable to zero?
Yes. Once you have sighted in your rifle, you can easily loosen the set screws on the outer dial of the turrets using an Allen key, align the "0" mark with your indicator line, and tighten them back down. This allows you to easily dial for distance and quickly return to your baseline zero.
9. Are these scopes waterproof and fogproof?
Yes. The SWFA SS Gen 2 scopes are nitrogen-purged and O-ring sealed. They are completely waterproof, fogproof, and shockproof, engineered to perform reliably in freezing temperatures, heavy rain, and harsh environments.
10. Does the reticle illuminate?
No, the SWFA SS fixed-power Gen 2 series utilizes a non-illuminated, laser-etched glass reticle. This ensures the reticle remains incredibly sharp, crisp, and permanently etched into the glass without relying on battery power.
SWFA SS 4-LIFE Warranty
Our aim is to ensure that your order arrives with you as soon as possible and in the safest, most cost-effective means.
Please Note: Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
Please Note: DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY - READ MORE: HERE
COURIERS
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We use DPD , RoyalMail, TNT and UPS courier services for all our orders whether dispatching to the UK or International. As soon as your order has been dispatched you will receive an email with your unique tracking number. We are unable to add delivery notes to your order regarding safe spaces or neighbour deliveries. If you require this service it can be arranged directly with the courier once the parcel is in their network.
IN-STORE ITEMS
These are items that we have in-stock and will be sent out for delivery as soon as possible. We aim to dispatch all orders within 1-2 working days, but during busy periods dispatch may be delayed by a day or so. If you would like to purchase the item in person then please call ahead to arrange an appointment: 01803 611 895.
PRE-ORDER ITEMS
These are usually items that are going to be out-of-stock for a number of weeks or are in short supply. By purchasing a Pre-Order Item you are in effect paying a deposit for your goods. As soon as the item is back in stock yours will be dispatched within 24 hours where possible. Please see individual product pages for current back-in-stock dates. In rare occasions, these dates can be changed by the manufacturers so we recommend staying in contact with Optics Warehouse depending on the product lead time.
INTERNATIONAL DELIVERY & TAXES
In addition to the above information If your delivery address is outside of the UK you may be subject to import duties and taxes, which are levied once a shipment reaches your country. Any such additional charges for customs clearance must be borne by you. You should note that customs policies vary widely from country to country. Optics Warehouse advises each customer to contact their local customs office for further information if they are in any way unsure of local duties or liabilities. Cross border shipments are subject to opening and inspection by customs authorities which means some packages may be opened and re-sealed.
NEED HELP?
If you require any further assistance, please call us on 01803 611 895 or email sales@opticswarehouse.co.uk
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A NOTE ABOUT DPD SHIPMENTS:
- Please be advised that we have now introduced DPD Pins to all DPD orders from Optics Warehouse.
- If your shipment is being sent from Optics Warehouse via DPD you will be sent a Pin Code that must be shown to the courier upon delivery.
- The pincode is sent VIA email & TEXT message. A valid email address and mobile number must be provided at checkout. Emails will be sent from "Riviera House 3PL" - if you do not receive this email please check your junk or spam folders.
- Please note that if you do not display your pin code to the courier driver upon delivery, you will not be able to have your item and you may need to schedule another delivery date to show a valid pin.
- Please view the attached slides HERE for further information!