Spuhr ISMS SP-3622C Ø30mm Tube 6 MIL (38 mm High) Gen 3 Cantilever Picatinny Scope Mount

• Cantilever 70 mm/2.76”
• Color Black Hardcoat Anodized
• Height 38 mm
• Quick Release No
• Rail/Type Picatinny
• Tilt 6 MIL/20.6 MOA
• Tube Diameter 30 mm

• Monolithic one‑piece construction - CNC‑machined from a single billet of aerospace‑grade aluminium to eliminate tolerance stacking, flex, and ring misalignment common in multi‑piece mounts.

• High‑rigidity structural geometry - Optimised cross‑section and material distribution provide exceptional torsional and vertical stiffness, maintaining optic alignment under heavy recoil and dynamic loading.

• Hard‑anodised surface treatment - Type III hard anodising delivers excellent abrasion resistance, corrosion protection, and a non‑reflective tactical finish.

• Diagonal ring split design - Improves load distribution around the scope tube while keeping elevation and windage turrets fully accessible, preventing obstruction during adjustment.

• Integrated scope levelling system - Built‑in bubble level allows the shooter to reference rifle cant and optic alignment directly on the mount for precise long‑range shooting.

• Multi‑axis accessory interface -  Machined mounting points on multiple faces of the mount support direct attachment of optical and electronic accessories without adding separate rails.

• Low‑profile accessory mounting - Keeps mounted devices close to the bore axis and centre of mass, preserving rifle balance and minimising parallax and offset errors.

• Precision‑cut recoil lugs and rail interface - Provides repeatable, slip‑free engagement with Picatinny rails for consistent return‑to‑zero performance.

• High‑strength fastener system - Torque‑optimised fasteners maintain clamping force under vibration and recoil, preventing optic movement or zero shift.

• Designed for extreme‑range precision - Engineered to support the mechanical and optical demands of ELR, PRS, and professional long‑range shooting platforms.

• Spuhr Cantilever Mount Ø30 H38mm/1.5" 6MIL PIC Gen3

How does built-in cant influence usable elevation travel in precision shooting?

Integrated cant shifts the scope’s mechanical zero lower within its adjustment range, allowing more upward elevation travel for long-distance shooting. This keeps the erector assembly operating closer to its optical center where mechanical tracking tends to be more consistent.

Does cant improve erector spring stability during large elevation adjustments?

Operating closer to the mechanical center reduces uneven spring compression inside the erector system. This helps maintain more uniform tracking resistance and reduces the likelihood of inconsistent adjustment response.

Can cant reduce internal optical distortion at extreme adjustment ranges?

Keeping adjustments closer to the optical center reduces the need for the internal lenses to operate near their edges. This can reduce minor aberrations and maintain consistent image sharpness across the field of view.

How does ring alignment affect scope tracking precision?

Precise ring alignment prevents torsional stress from being transferred into the scope tube. Minimizing stress allows the erector assembly to move smoothly and maintain consistent tracking behavior.

Can uneven torque create alignment errors in the mount?

Uneven torque can introduce slight angular misalignment between the rings and scope tube. This misalignment can cause localized compression and increase resistance in the erector mechanism.

Does mount placement influence rifle balance and recoil control?

Moving the mount forward shifts the rifle’s center of mass slightly toward the muzzle. This can change how recoil impulse is transmitted through the shooting position.

How does the mount behave under rapid temperature changes?

The mount expands and contracts uniformly due to its monolithic construction. This preserves ring alignment and prevents differential stress on the scope tube.

Can rail imperfections affect mount alignment?

Minor surface irregularities are usually bridged by the mount's rigid base. Significant dimensional deviations can introduce tilt that affects optical axis alignment.

How does ring spacing influence scope tube stress?

Wider ring spacing distributes recoil forces across a larger portion of the scope tube. This reduces localized bending stress near the erector housing.

Can excessive torque affect optical performance?

Over-tightening can slightly deform the scope tube and alter the internal alignment of optical components. This may increase friction in the erector system and affect tracking consistency.

How does the mount resist scope tube slippage under recoil?

Even clamping pressure creates uniform friction around the tube circumference. This prevents axial movement even during high recoil impulse events.

Does repeated recoil affect mount rigidity over time?

Material fatigue is minimal within normal operating conditions due to the mount’s structural stiffness. Proper torque maintenance ensures long-term rigidity.

Can improper installation affect long-range precision?

Small angular misalignments at the mount level translate into larger point-of-impact deviations at long distances. Careful installation minimizes cumulative alignment error.

What installation error most commonly affects tracking accuracy?

Uneven ring torque is the most common cause of internal scope stress. This stress can increase erector friction and produce inconsistent adjustment response.

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

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!