BKL-303 30mm Single Strap 9-11mm Dovetail Rifle Scope Mount Rings - Medium
Rock-solid 30mm scope mounts for air rifle or rimfire
Self-aligning clamping, scope-friendly rings, and no-lap installation
For 9–11mm rails. Precision fit – Easy setup – Scope tube protection
32mm base to ring center. Scopes upto 60mm objective outer diameter on flat base.
Don’t rely on the word “Low.” In BKL’s lineup the 303 is lower than their 300/301, but compared to most brands it’s closer to a Medium. There’s no industry-wide standard for ring height, so always go by the actual measurement: 17 mm base to ring bottom / 32 mm to centre.
BKL 303 30mm 2-Piece Dovetail Scope Mounts – Self-Aligning, No-Lap Rings – 9–11mm Rails
Perfect for air rifles and rimfires with standard 9–11mm dovetail rails. The BKL 303 is a precision-engineered 2-piece mount for 30mm scope tubes, featuring:
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Radiused inner rings to prevent scope marking
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BKL’s self-aligning clamp system grips 3/8” & 11mm dovetails evenly
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No lapping required – true, stress-free installation
Specifications:
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Ring Diameter: 30mm (1.18")
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Base Type: 9–11mm dovetail
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Mount Type: 2-piece
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Height: 17mm (base to ring bottom), 32mm (to ring centre)
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Height - Labelled "Low" but in most users defintion and compared to other manufacturers they are Medium.
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Weight: 84g
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Material: High-grade aluminium
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Finish: Matte black anodised
Fits:
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9–11mm dovetail rails on airguns & rimfires (Weihrauch, Air Arms, CZ 452 etc.)
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Scopes with 30mm tubes, including those with larger objectives
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Shooters wanting quick install, perfect alignment, and no tube damage
Not compatible with:
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Picatinny/Weaver rails
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Wider dovetails (CZ 457, Tikka etc.)
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Proprietary bases
Scope Clearance Guide (example):See FAQs for more info
Distance base to ring center = 32mm. Ring diameter = 15mm
Scope measured with outer diameter (no lens) 60mm bell = 30mm radius
30 – 15 = 15mm needed under bell
Mount offers 17mm → ~2mm clearance
(Add ~1mm safety margin to your calculation)
About BKL
Made in the USA and backed by a limited lifetime warranty. BKL mounts are known for engineering excellence, secure hold, and easy alignment – a top choice for UK shooters.
PLEASE NOTE – The mount in the diagram is not the mount you’re purchasing, purely an illustration for measurement purposes only.
Height A - 29.27 mm
Height B - 14.27 mm
Height C - 32.27 mm
If you’re unsure what mounts you require for your setup, please call our sales team on +44 (0) 1803611895 or contact [email protected] prior to purchase.
- Designed for the shooter who needs stability and prefers independent rings
- High-performance aluminium
- Patented clamping system
- BKL-303 30mm 2pc Single Strap Low Dovetail Scope Rings.
Q1 — What size scope tube do these rings fit?
They fit 30 mm scope tubes.
Q2 — What rail do they fit?
Designed for 9–11 mm dovetail rails (air rifles, rimfires, etc.). Not suitable for Picatinny or Weaver.
Q3 — Are these really ‘Low’ rings?
BKL labels them “Low” because they sit below the taller BKL-300/301 models in their own range. Compared to most other brands, the 303 actually measures more like a Medium.
???? Always buy by actual height measurements — not the manufacturer’s “low/medium/high” tag, because there is no universal engineering standard across brands.
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Base to ring bottom: 17 mm
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Base to ring centre: 32 mm
Q4 — Will my scope’s objective clear the barrel?
For a 60 mm objective (30 mm radius), you’ll have about 2 mm clearance with these rings. Always add 1–2 mm safety margin.
Q5 — Do I need to lap the rings?
No. BKL’s self-aligning clamp system means lapping isn’t required.
Q6 — Can I use these on centrefire rifles?
Only if the rifle has a standard 9–11 mm dovetail. Not for wider dovetails (e.g. some BSA/CZ/Tikka), Picatinny, Weaver, or interrupted rails.
Q7 — What are they made from?
High-grade aluminium, matte black anodised. Approx. 84 g per pair.
Q8 — Will the rings damage my scope tube?
The inner profile is radiused to protect the tube and spread clamping force evenly.
Q9 — What warranty is included?
Supplied with a one-year manufacturer’s warranty.
Q10 — I’m unsure if they’ll fit my setup — what should I do?
Measure your rail width and objective diameter, then compare with the clearance guide below. If still unsure, contact us before buying.
- One year manufacturer's warranty.
Tactical Scope Shipping Policy
Our aim is to ensure that your order arrives with you as soon as possible and in the safest, most cost-effective means.
Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY – READ MORE: HERE
Note: The above DPD link is to our group partner site Optics Warehouse, with whom we share logistics and stock. Link opens in a new window.
Couriers
We use DPD, Royal Mail, TNT, and UPS courier services for all our UK and international orders. Once your order is dispatched, you will receive an email with your unique tracking number.
In-Store Items
These are items we have in stock and aim to dispatch within 1–2 working days. During busy periods, this may be delayed slightly. If you'd prefer to collect your item in person, please contact us in advance to arrange. Collection orders must be paid for beforehand.
Pre-Order Items
Pre-order items are typically out-of-stock or in limited supply. Purchasing a pre-order secures your item, and it will be dispatched within 24 hours of restock where possible. Check the product page for estimated restock dates. These dates may change, so staying in touch is advised.
International Delivery & Taxes
If your shipping address is outside the UK, you may incur import duties or taxes upon arrival in your country. These charges are your responsibility. Customs regulations vary, so please check with your local customs office. Some packages may be opened for inspection.
Need Help?
If you need assistance, call us at +44 (0)1803 611895 (Optics Warehouse) or email [email protected].
DPD Shipments & PIN Code Delivery
We have now introduced DPD Pin Code verification for all orders shipped via DPD. You will receive a PIN via email and text.
A valid email and mobile number must be provided at checkout. Emails will come from Riviera House 3PL. Please check spam/junk folders if not received.
Failure to present your PIN to the delivery driver will result in a failed delivery and rescheduling may be required.