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Spuhr ISMS QDP Quick Detach Picatinny Mount-30mm-20 MOA-38mm
Spuhr ISMS QDP Quick Detach Picatinny Mount-30mm-20 MOA-38mm
Spuhr
SKU#QDP-3602 Spuhr

Spuhr ISMS QDP-3602 Ø30mm Tube 6 MIL (38 mm High) Quick Detach Picatinny Scope Mount

2 in stock

"This high-mount 30mm Spuhr QDP with 20 MOA is tailor-made for modern precision platforms that need extra elevation and optic clearance. Whether you’re running a clip-on thermal, a large objective scope, or a night-vision bridge, the 38mm height provides plenty of room without sacrificing ergonomics. Combine that with Spuhr’s legendary return-to-zero and this becomes a serious tool for long-range and tactical shooters." - Thomas (Online Sales Associate & Product Specialist).

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Product Information FIND OUT MORE
DESCRIPTION

The Spuhr ISMS (Ideal Scope Mount System) is a high-performance mounting solution engineered for shooters who demand unmatched stability, precision, and modular versatility. Its single-piece, billet-machined aluminium construction provides exceptional rigidity, virtually eliminating flex under recoil and ensuring repeatable zero for long-range, tactical, and competition applications.

The system’s diagonally split rings give unobstructed access to elevation and windage turrets, allowing fast and precise adjustments without interference. An integrated levelling system and alignment wedge ensure the optic is perfectly level during setup, critical for extreme-range accuracy and consistent shot placement.

Multiple interface points along the mount allow secure attachment of a wide range of accessories, from lasers and rangefinders to backup optics and night-vision devices, without affecting rifle balance or ergonomics. Machined from aerospace-grade aluminium and finished with hard-anodised coating, the ISMS offers exceptional durability, corrosion resistance, and mechanical integrity under heavy recoil and field conditions.

With its combination of precision machining, modular functionality, and rock-solid strength, the Spuhr ISMS is designed to elevate any rifle platform, providing a foundation for accurate, repeatable, and adaptable long-range performance.

Ring Height - 38mm

 

SPECS
  • 30mm Tube
  • 6 MIL/20.6 MOA
  • Height: 38 mm/1.5”
  • Length: 126 mm/4.96” (mount body only)
  • Weight: 270 g/9.5 oz
  • 10-degree wedge included

FEATURES
  • 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.
WHAT'S IN THE BOX
  • Spuhr ISMS QDP-3602 30mm High (38mm) Quick Detach 20 MOA Picatinny Mount. 
FREQUENTLY ASKED QUESTION(S)

Why combine a high optical axis with 20 MOA of cant?
This configuration is designed for rifles running large objective lenses, clip-on devices, or tall chassis systems while still providing the mechanical elevation needed for extreme long-range shooting.

How does the increased height influence recoil behaviour?
Although the optic sits higher, the Spuhr one-piece body resists torsional flex. The QDP-3602 controls the increased leverage from recoil by distributing force through a wide Picatinny engagement surface.

How does the 20 MOA cant improve long-range tracking?
It shifts the erector system closer to its optical center at long distances, improving tracking linearity and reducing the risk of running out of elevation before reaching target range.

Is this mount well suited to clip-on night-vision or thermal units?
Yes. The increased height allows front-mounted devices to clear the rail and barrel, while the rigid alignment preserves optical collinearity.

How does the QDP interface perform on a tall, canted mount?
The cam-locking system ensures the mount always seats against the same rail faces, preventing vertical or horizontal zero shift when the optic is removed and reattached.

Does this model handle heavy optics well?
Yes. The wide ring spacing and monolithic body prevent scope sag or tube flex, even with large, front-heavy scopes.

How does this mount affect parallax sensitivity?
Higher mounts can make eye position more critical, but the consistent geometry of the QDP-3602 keeps parallax behaviour stable once the shooter’s position is set.

Why would someone choose this over a lower 20 MOA mount?
Shooters using large objectives, suppressors, clip-ons, or tall chassis stocks benefit from the added clearance and improved head position.

Does the high mount reduce cheek-weld quality?
On traditional stocks it can, but on modern adjustable-comb chassis systems it actually improves ergonomics by aligning the optic with the shooter’s natural head position.

Is the QDP-3602 suitable for magnum calibers?
Yes. The mount’s recoil lug and clamping system prevent forward movement even under sharp recoil impulses.

How does the mount influence long-range ballistic consistency?
By keeping the optic within its optimal mechanical adjustment range, ballistic solutions remain more accurate and repeatable.

Why is this mount popular for extreme-distance rifles?
It combines elevation capability, optical clearance, and repeatable zero into a single rigid platform, making it ideal for advanced long-range and precision applications.

DELIVERY & RETURNS

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!
MOUNT SIZE GUIDE
Ring Height Calculator
This calculator works out the minimum ring height (base-to-centre) you should use, including a tolerance allowance.
Please note: All clearance calculations are based on mounts with 0 MOA. While MOA can be factored in, actual clearance may vary due to variables that can't always be accurately calculated. If you're considering an MOA mount and are unsure about the required height, we recommend contacting our sales team directly.
Diagram showing where to measure the scope objective outer diameter

Measure the outermost diameter of your scope’s objective bell (including any flare).

Diagram showing where to measure scope cover thickness

Measure the thickness of any scope cover if used. If none, leave as 0.

Diagram showing where to measure rail to barrel clearance

Measure from the top of the rail to the highest point of the barrel.

Tolerance
We add a little extra clearance to account for real-world variation. Default is +1 mm.
Minimum Ring Height Needed: 0.00 mm (0.00 inches)

Enter your measurements above to calculate the lowest ring height (base-to-centre) you can realistically use.

Includes tolerance
Diagram showing where ring height is measured from the base to the centre of the scope tube
Formula used: (A + 2×B) / 2 − C + T
Where A = objective outer diameter, B = cover thickness, C = rail-to-barrel clearance, T = tolerance.
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