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ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope
ZCO ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope
ZCO (Zero Compromise Optic)
SKU#400-0201 ZCO (Zero Compromise Optic)

Zero Compromise Optic (ZCO) ZC420 4-20X50 FFP Illuminated MPCT1 0.1 MIL Rifle Scope w/ Spuhr One Piece Mount

Preorder: 30-60 Day Delivery
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EXCHANGE GUARANTEE60 day Scope Out Guarantee
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Same Day Dispatch on in-stock items before 14:30pm
Product Information FIND OUT MORE

Includes FREE Spuhr Mount - 
(Please Note - Does NOT include Spuhr QDP).

The Zero Compromise Optic ZC420 combines excellent optical performance with unmatched mechanical precision in the best ultra-short design ever developed.
It combines the highest levels of mechanical precision, unmatched optical performance, and extreme durability in a compact package that can compete with much larger riflescopes. This small riflescope with a length of 325mm (12.8 inches) and a weight of only 986g (34.8oz) is ideal for any application where size and maximum performance are paramount.

The low magnification provides a wide field of view for rapid target acquisition while the mechanical system allows for 35 mils of elevation adjustment for the extreme long-range engagements when required.

Never before has so much performance been combined in such an elegant and compact riflescope.


Our optical engineers have set the next standard for clarity, light transmission and resolution in a compact package.

Total light transmission is 92% while maintaining excellent color fidelity matched with best in class resolution for the ultimate viewing experience.

The very best in optical performance results in heightened viewing comfort for all-day use so you can enjoy being behind your scope for extended shooting sessions.

  • Magnification (Objective): 4-20
  • Objective ∅ (mm): 50
  • Main Tube Diameter (mm): 36
  • Click Value (MIL): 0.1
  • Elevation (MIL): 35
  • Elevation (m/100m): 350cm / 100m
  • Elevation lock: YES
  • Windage (MIL): 20
  • Side Adjustment (cm/100m): 200cm / 100m
  • Windage lock: YES
  • Field of View (ft/100yd): 28.0`- 6.0`
  • Field of View (m/100m): 9,3m - 2m / 100m
  • Eye Relief (inches): 3.54
  • Pupil Distance (mm): 90
  • Parallax Compensation (m): 25 - ∞
  • Length (inches): 12.8
  • Length (mm): 325
  • Weight (oz): 34.8
  • Weight (g): 986
  • Illumination: red | green
  • Focal Plane: FIRST
  • Light transmission (%): 92
  • Diopter: -3 | +2
  • Exit Pupil (mm): 10.9 - 2.5



Zero Compromise Optics (ZCO) ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope W/ Free Spuhr ISMS Scope Mount

Every ZCO product places the reticle in the First Focal Plane of the optical system. This means that the reticle stays the
same size in relation to the target no matter the magnification setting.

Whether you are using a mil radian (MIL) or Minute of Angle (MOA) reticle, it is important to remember this is simply an
angular unit of measure. This angle is the same no matter the distance; 1 MIL at 100 yards is also 1 MIL at 500 yards and
1 MOA at 100 yards is also 1 MOA at 500 yards.

This is important for making corrections to the elevation or windage turrets through observed impact of the bullet down
range, no matter the distance, as well as for range estimation with the reticle.
Follow the desired formula below to determine your target distance.

1. Target size in inches x 27.77 / Target size in MIL = Target distance in Yards.
2. Target size in inches x 25.4 / Target size in MIL = Target distance in Meters.
3. Target size in cm x 10.93 / Target size in MIL = Target distance in Yards.
4. Target size in cm x 10 / Target size in MIL = Target distance in Meters.

1. Target size in inches x 95.5 / Target size in MOA = Target distance in Yards
2. Target size in inches x 87.3 / Target size in MOA = Target distance in Meters.
3. Target size in cm x 37.60 / Target size in MOA = Target distance in Yards.
4. Target size in cm X 34.38 / Target size in MOA = Target distance in Meters.

Follow this example:

You know a steel target down range measures 18” x 24” and a mil reading with the reticle in your scope gives 1.00 MIL
and 1.33 MIL respectively, and you want the distance to be in “Yards.”
18 x 27.77 = 499.86 Yards 24 x 27.77 = 501.11 Yards
1.00 MIL 1.33 MIL

In this example, we could figure for a 500 yard target distance. Obtaining accurate mil readings through the scope takes
practice, and the more accurate the reading, the more accurate the calculated distance.

Since the reticle is in the First Focal Plane (FFP) and we know that mils or MOA is an angular unit of measure, we can
make fast and accurate corrections to the elevation or windage turrets on the scope when we observe bullet impact down
range that is not where we want it to be. The reticle now essentially becomes a magnified ruler and is accurate no matter
the distance.

Place the crosshairs where you want the bullet to impact, then observe where the bullet actually went. Read the reticle for
both vertical and horizontal displacement (MIL or MOA depending on the reticle) based on actual bullet impact. If the group
needs to come up and left for example, dial the exact amount on the elevation turret in the UP direction and LEFT on the
windage turret as measured with the reticle.

  • Zero Compromise Optic (ZCO) ZC420 4-20X50 IR FFP Mil/MIL MPCT1 Rifle Scope

Manufacturer's Life Time Transferable Warranty

All ZCO products are handcrafted with the greatest care and subjected to numerous tests and inspections before they are shipped.

In the highly unlikely event that a problem occurs with your ZCO riflescope, we offer you a transferable lifetime guarantee which, under normal use, includes mechanical and optical defects caused by the material or workmanship over the entire service life of the riflescope.
At our discretion, we will either repair a defective product or replace it (with a product of the same or a similar model) after a thorough inspection.

Exceptions to this guarantee are intentional improper or improper use, unauthorized changes or repairs, modifications or destruction of the serial number, improper assembly, negligence in handling the product and damage from fire, flooding or other natural disasters.

The electronic components built into this product are provided with a limited guarantee of 2 years from the date of purchase. With normal use, this includes material or processing-related defects.

For ZCO assemblies and ZCO assembly accessories, we offer you a guarantee period of 90 days from the date of purchase in the event that material or processing-related mechanical defects occur during normal use.

At our discretion, we will either repair a defective product or replace it (with a product of the same or a similar model) after a thorough inspection.

Sending the product in for service

Follow the steps below to guarantee timely processing:

  1. Remove any accessories (sun visors, etc.)
  2. Make a note of the serial number of your riflescope in writing and keep it to hand for possible queries.
  3. Describe the error and place this document in the package with the rifle scope.
  4. Place the ZCO product well padded and ideally in the original box, packed in a shipping box and adequately secure your package with adhesive tape. The original box alone is not enough for shipping.
  5. Return your product insured and with a tracking number to the following address:

Zero Compromise Optic GmbH
Rep. Department
Bäckerstraße 1
2433 Margarethen am Moos

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.



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.


These are items that we have in-stock and will be sent out for delivery within 1-2 working days. If you would like to purchase the item in person then please call ahead to arrange an appointment: 01803 611 895.


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.


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.


If you require any further assistance, please call us on 01803 611 895 or email



  • 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.
  • 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!
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