Spuhr ISMS QDP-4602 Ø34mm Tube 6 MIL (38 mm High) Quick Detach Picatinny Scope Mount

• Diameter: 34mm
• Height: 38 mm/1.5”
• Length: 121 mm/4.76” (mount body only)
• Weight: 267 g/9.4 oz
• 10-degree wedge included

• 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 ISMS QDP-4602 34mm High (38mm) Quick Detach 20.6 MOA Picatinny Mount. 

Why is 20 MOA particularly valuable on a 34 mm QDP mount?
Large-tube scopes are often used for extreme long-range shooting. The built-in 20 MOA shifts the optic downward so more of the scope’s internal elevation remains available for dialing at long distances without pushing the erector to its limits.

How does the cant affect optical tracking accuracy?
By keeping the erector closer to its mechanical center, the scope tracks more linearly and consistently, which improves ballistic repeatability when dialing up and back down over large elevation ranges.

Does the angled base make zeroing more sensitive?
It requires careful leveling during installation, but once properly aligned it actually improves zero stability because the scope is not operating at the edge of its adjustment range.

How does the 38 mm height complement the 20 MOA cant?
The additional height provides clearance for large objective lenses and clip-on devices while keeping the shooter’s head position comfortable on modern long-range chassis systems.

Why is the QDP interface important on a canted mount?
On angled mounts, even small shifts can produce noticeable point-of-impact changes at long range. The QDP system ensures the mount returns to exactly the same rail interface every time it is reattached.

How does the 34 mm tube diameter improve rigidity on this model?
The larger ring diameter increases the contact area between mount and scope tube, reducing micro-slippage and improving resistance to torsional loads under recoil.

Is this mount suitable for extremely heavy optics?
Yes. The wide ring spacing and one-piece body distribute the optic’s mass evenly, preventing sag or tube flex that could otherwise affect zero.

How does this mount perform on magnum calibers?
The recoil lug and cam-locked Picatinny engagement prevent forward or rearward movement even under sharp recoil impulses typical of magnum cartridges.

Can this mount be paired with night-vision or thermal clip-ons?
Yes. The rigid alignment and repeatable zero are ideal for inline devices that require consistent optical axis positioning.

Is the QDP-4602 suitable for competition shooting?
Yes. Long-range competitors value the built-in cant and quick-detach repeatability for switching optics or transporting rifles without losing zero.

Does the added cant increase stress on the scope?
No. The cant is in the mount, not the tube. The scope remains straight and evenly clamped, so there is no bending force applied to the optic body.

Why would someone choose this over a flat 34 mm QDP mount?
Shooters who regularly engage targets at extreme distances benefit from the extra mechanical elevation and improved tracking that the 20 MOA version provides.

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!