• Available in 30mm & 34mm • 1.93" Optical Centerline • Zero MOA Angle • Kastle® KNEKT™ Modular Slots • Titanium K-CLAMP™ Mounting • 7075-T651 Aluminum Construction • Type III MIL SPEC Hardcoat Anodized Finish • 100% Made in The U.S.A.
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Overview
The FSM-193™ scope mount offers a 1.93" optical centerline height over rail. It is designed for use with 30mm & 34mm optics and built to handle anything from a standard LPVO to larger objective options on the market. The FSM-154™ comes equipped with our titanium K-CLAMP™ mounting technology, four individual KNEKT™ ports, and an industry leading suite of accessories making this the lightest, strongest, most mission adaptable mount on the market. Made 100% in the USA from 7075-T651 aluminum and type III MILSPEC hardcoat anodized in 5 available finishes.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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PRECISION ELEVATED
Foundation of Excellence
Built for Performance
Machined in our facility using decades of defense and aerospace manufacturing experience, the Kastle® FSM™ program delivers precision and reliability. Built with input from military, law enforcement, and competitive shooters, this mount is designed for real-world use.
Extensive field testing across different environments proves the full FSM™ product line performs when it matters most.
Advanced Mounting Systems
The full FSM™ scope mount line features our proprietary K-Clamp™ titanium mounting technology, delivering exceptional clamping force and stability on any MIL-STD-1913 Picatinny rail system while maintaining the lightweight characteristics essential for dynamic shooting applications. Our KNEKT™ accessory ports utilize a locating boss & two custom precision ground shoulder bolts for a reliable return to zero mounting interface. Exstensive engineering, relentless T&E, unmatched precision manufacturing, and aerospace level quality control comes standard with every single Kastle® mount.
Lifetime Warranty
We manufacture every component in-house to ensure quality control from start to finish. While others outsource production, we maintain complete control over manufacturing to deliver the precision and reliability you expect. That's why we back every mount with a lifetime warranty.
Zero Compromise
Every aspect of our process is approached with the highest level of detail to both form and function. We believe a superior product should perform impeccably and look equally impressive. In an era where production is often outsourced, our lineage in advanced in-house manufacturing shapes our steadfast commitment to precision, reliability, and unparalleled quality.
The 1.54" height is the ideal for most long range and precision shooting applications. Those who prefer a heads-up shooting position or need additional clearance for night vision devices choose 1.93".
What is the torque specification for installation?
The FSM™ top ring screws require 15 in-lbs while the K-Clamp™ mounting system requires 25 in-lbs of torque. Over-torquing can damage the rail system or mount. Always use a quality torque wrench for installation.
Will this work with my specific optic?
The FSM-93™ is designed for any optic that utilizes a 30mm & 34mm tube diameter. Contact our technical team for specific optic questions.
Does this require any special tools for installation?
Installation requires only the T25 & T10 Torx bit (included) and a torque wrench capable of 10-25 in-lbs. All necessary hardware is included. Additional third-party tools can be used to properly level the optic inside the mount.
How does the K-Clamp™ technology work?
Our patent-pending K-Clamp™ utilizes titanium components to distribute clamping force evenly across the Picatinny rail, preventing rail deformation while ensuring return-to-zero capability. The entire Kastle mount recesses down into the picatinny rail giving you a proprietary two point recoil lug system optimized at the front and rear of the mount.
What's the difference between Type III anodizing and standard finishes?
Type III MIL SPEC hardcoat anodizing provides superior corrosion resistance and surface hardness compared to standard Type II finishes, ensuring long-term durability in harsh environments.
Can this mount handle full-auto fire?
Absolutely. The full FSM™ product line has been tested extensively with full-automatic select fire weapons systems and maintains zero under extreme conditions.
What's the expected lifespan of this mount?
With proper installation and normal use, the The full FSM™ product line is designed for indefinite service life. That's why we back it with our lifetime warranty.
Which color should I choose?
Black- You should know this one.
Flat Dark Earth - Traditional deep & rich FDE color. Pairs great with all shades of FDE.
Desert Sand - On the lighter side of the "Tanodize" spectrum and pairs well with less saturated shades of tan or FDE.
Clear - This anodize produces a champagne grey finish that shifts with the light. Pairs great with all clear ano and Q™ products.
OD Green - No, we didn't forget about this classic. Pairs well with anything olive drab or ranger green. Also a good match with Noveske™ bazooka green.
Pro Tip: Try mix-matching colors for a unique look.
Disclaimer: Anodize processing varies slightly in color by batch. Anodize may look different than what is pictured.
Can I have this mount custom Cerakoted?
Yes, order in "Clear" finish for custom Cerakote applications.
What does the lifetime warranty cover?
Our lifetime warranty covers defects in materials and workmanship for the original purchaser. Normal wear, abuse, and modifications are not covered.
What if I need technical support?
Contact our technical team at comms@kastle.group or through our dealer network. Our team provides comprehensive installation and troubleshooting support.
Do you offer military or law enforcement discounts?
Yes, we support our nation's protectors.Contact us directly with valid credentials for pricing information.
When will this be back in stock?
We work to restock products as quickly as possible. Use the "Notify me when available" feature to receive immediate notification when inventory is restored.
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