X4-FCS
$3,495.00
The revolutionary fire control system for your preferred LPVO.
Integrated auto-calculated ballistics mount for any caliber.
The X4-FCS™ mount provides real time ballistic calculations using temperature, pressure, humidity, pitch, roll, and heading.
Combining these parameters with user supplied bullet and firearm data, the X4-FCS generates a precision ballistic compensated offset reticle.
Notification to customers that bought an X4-LRF or X4 Low-Profile Remote before Nov 17, 2025: Click here for low-temperature recall notice of your X4 Low-Profile Remote
CALIFORNIA WARNING: Can expose you to formaldehyde, a carcinogen, and bisphenol S (BPS), a reproductive toxicant. See www.P65Warnings.ca.gov.
Also available at Maztech Preferred Distributors:
User-customizable symbology on daylight-readable display
Designed to meet MIL-STD-810 environmental specs
Compatible with most 30 mm and 34 mm LPVO scopes
Manufactured from solid billet aircraft-grade 7075-T6 aluminum
Designed and manufactured in the USA
The X4-FCS is compatible with most 30mm and 34mm Low-Power Variable Optics (LPVOs).
Download and print the X4-FCS Scope Compatibility Guide to compare your scope against actual X4-FCS dimensions.
Examples of compatible LPVO reticles.
These will not interfere with visibility of the X4-FCS reticle:
Examples of non-optimal LPVO reticles.
These can still be utilized with the X4-FCS using the digital ballistic readout feature (available via advanced menu options):
These accessories sold separately:
X4-FCS
X4-LRF
X4 FCS-to-LRF Cable
X4 Rail-Mounted Remote
X4 Low-Profile Remote
X4 Diving Board Mount
Or evaluate the whole X4 System:
X4 System
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Caliber:
Any
Platform:
STANAG 4694
(Compatible with STANAG 2324 / Picatinny MIL-STD-1913)
Scope Compatibility:
Most 30 mm or 34 mm LPVO scopes
Reticle Color:
Green
External Color:
Black
Weight:
22.6 oz (642 grams) with batteries
Dimensions (L,W,H):
8.2 in x 2.3 in x 3.0 in (209 mm x 59 mm x 77 mm)
Battery Type:
Supplied - Rechargeable USB-C 18650 (2x)
Optional - CR123 (4x)
Battery Life:
1 year at 10 operating hours per week
Connectivity:
Bluetooth® Low Energy, Near-Field Communication (NFC), and Ultra-Wideband (UWB). Each can be disabled.
Ballistics Solver:
Applied Ballistics®
Temperature Rating:
-40°F to +140°F (-40°C to 60°C) subject to appropriate temperature-rated batteries.
Use the Maztech Companion App for Quick Setup of Ballistic Profiles.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Maztech Industries is under license. Other trademarks and trade names are those of their respective owners.
The X4-FCS comes with:
Two rechargeable 18650 batteries
Two USB-C charging cables
Lens cleaning cloth
Drawstring bag
T15 Torx wrench
Loctite® 242
Mini flathead screwdriver
Bluetooth® USB Dongle
Quick Start Guide
User Manual
Maztech Patch
Maztech Stickers
EXPORT NOTICE: The X4-FCS is controlled for export under the International Traffic in Arms Regulations (ITAR), which are administered by the U.S. Department of State and listed on the United States Munitions List (USML). As part of your acceptance of goods, technical data, or services provided, you acknowledge that the unauthorized export, re-export, transfer, or disclosure, directly or indirectly, of the controlled items, technical data, or services is strictly prohibited under U.S. law. Violations of these regulations are subject to severe civil and criminal penalties, including fines and imprisonment.
It is the sole responsibility of the customer to comply with all applicable U.S. export control laws and regulations, including obtaining the necessary licenses or other governmental authorizations prior to exporting, re-exporting, or transferring controlled items, technical data, or services. By acquiring ITAR-controlled products or data, you represent and warrant that you are not prohibited from receiving such items under U.S. export laws.
PLEASE NOTE: Certain jurisdictions may restrict the sale, shipment, or use of this product. It is your responsibility to comply with local laws.
WARNING: Observe safe firearm handling practices at all times. Failure to do so may result in serious bodily injury or death. Maztech Industries shall not be responsible for injury, death, or property damage resulting from faulty installation, misuse, illegal use, or modification of this product.
Is the X4-FCS™ ITAR restricted?
Yes, the X4-FCS™ must be sold to US Persons within the USA.
Where is the X4-FCS™ made?
Designed, Engineered, and Manufactured in the USA.
Will the X4-FCS™ be compatible with Magpul's Rounds Remaining technology?
Yes. The X4-FCS™ will display rounds remaining.
Is the X4-FCS™ compatible with first and second focal plane sights?
Yes. The X4-FCS™ is compatible with both first focal plane sights and second focal plane sights.
Does the X4-FCS™ affect my LPVO's performance?
The X4-FCS™ provides enhanced capabilities without reducing your LPVO's performance.
What LPVOs are compatible with the X4-FCS™?
The X4-FCS™ is designed to be compatible with most 30 mm or 34 mm LPVOs. A different variant is sold for each LPVO size.
What is an LPVO?
A LPVO is a Low-Power Variable Optic scope. It usually comes in 30 mm or 34 mm configurations.
Does the X4-FCS™ come with a scope?
No, the X4-FCS™ does not include a scope. The X4-FCS™ is designed to work with a user-supplied 30 mm or 34 mm LPVO.
Does the X4-FCS™ come with a laser rangefinder?
No, the X4-LRF™ is sold separately.
I don't want the X4-FCS™ to transmit anything. Can I disable the network systems?
Yes. The UWB, Bluetooth®, and NFC systems can be completely disabled.
Do I need a phone or computer to use the X4-FCS™?
No. The X4-FCS™ has been designed to run standalone without ever needing to connect to another device or the internet. However some of the more advanced configuration options are only accessible via a phone.
Does the X4-FCS™ have an Ultra-Wide Band (UWB) radio?
The X4-FCS™ has a UWB radio which allows it to host a personal-area, secured, encrypted network for X4 wireless accessory communication (coming soon). The radio is OFF by default.
Does the X4-FCS™ have a Near-Field Communication (NFC) system?
The X4-FCS™ has an NFC system to allow for easy one-touch pairing of X4 Accessories. Simply hold an X4 wireless accessory (coming soon) next to the X4-FCS™ NFC touchpoint and it will instantly pair to your X4-FCS™ secure network. The NFC is OFF by default.
What is the X4-FCS™ body made from?
Billet 7075-T6 Aluminum.
What is the X4-FCS™ optic height off rail?
1.93 inches (49mm) for a standard 1913 Picatinny Rail.
How much does the X4-FCS™ weigh?
The X4-FCS™ weighs 22.6 oz (642g) with 18650 batteries (without LPVO).
Can the X4-FCS™ be spray painted OR have a bake-on coating (e.g. Cerakote) applied to it?
Bake-on coating, including low-temperature Cerakote, CANNOT be used on the X4-FCS™. Spray-paint can be utilized as long as proper instructions are followed to avoid damage (see X4-FCS user manual).
What body color options are available for the X4-FCS™?
The X4-FCS™ comes in Black. Coming soon: Flat Dark Earth (FDE), or Olive Drab (OD) Green options. Note: The body is Type III Hard Anodize Finished - individual color shades may vary.
Can the symbology positions and sizes be changed?
The symbology positions and sizes are customizable by the user.
Can I see the display symbology in bright daylight conditions?
Yes. The X4-FCS™ has been specifically designed to provide ultra-high brightness symbology and text that can be viewed in full sunlight.
What color display symbology is available?
Display symbology (reticle and text) is green.
What happens if my X4-FCS™ runs out of power?
You will still be able to use your LPVO, even if the X4-FCS™ batteries are depleted.
Does the X4-FCS™ come with batteries?
The X4-FCS™ comes with two rechargeable, protected cell 18650s with integrated charger and cable.
How long do the X4-FCS™ batteries last?
1 year at 10 hours per week for typical usage. The X4-FCS™ uses motion activated wake technology allowing the system to sleep when not in use and to instantly turn on when you need it, greatly extending the battery life.
What is the maximum ballistic drop the X4-FCS™ can display?
115 MOA (33 MIL)
What is the per click adjustment of the X4-FCS™?
0.5 MOA.
Does the X4-FCS™ ballistic reticle remain accurate at any LPVO zoom level?
Yes. The X4-FCS™ symbology operates equivalent to a first focal plane sight. The symbols zoom with the LPVO zoom.
Can I utilize the X4-LRF™ ballistic solver if I don't have an X4-FCS™?
Yes.
What environmental variables does the ballistic solver use?
The X4-FCS™ and X4-LRF™ ballistic solvers utilize temperature, humidity, pressure, pitch, roll and heading from the onboard sensors. Wind is utilized but must be manually entered (Kestrel compatibility coming soon).
What weapon and ammunition types are supported?
The X4-FCS™ and X4-LRF™ ballistic solvers support the vast majority of bullet and weapon types on the market.
What ballistics solver does the X4-FCS™ and X4-LRF™ utilize?
Applied Ballistics
What temperature ranges can the X4-FCS™ and X4-LRF™ handle?
The operating range is -40° F to 140° F (-40° C to 60° C), subject to appropriate temperature-rated batteries.
Are the X4-FCS™ and X4-LRF™ waterproof?
The X4-FCS™ and X4-LRF™ are designed for submersion in 3 feet of water for 30 minutes.
Are the X4-FCS™ and X4-LRF™ rated for high shock weapons like the SCAR17?
Yes.
All dimensions are in millimeters (mm)
User-customizable symbology on daylight-readable display
Designed to meet MIL-STD-810 environmental specs
Compatible with most 30 mm and 34 mm LPVO scopes
Manufactured from solid billet aircraft-grade 7075-T6 aluminum
Designed and manufactured in the USA
