• M1913 Picatinny Riser Platform • 2.26" Optical Centerline Height • Titanium K-Clamp™ Mounting Technology • 7075-T651 Aluminum Construction • Type III MIL SPEC Hardcoat Anodized Finish • 100% Made in The U.S.A.
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Overview
The Kastle EXPS-226™ optic riser delivers a precise 2.26" optical centerline height, elevating your EXPS holographic sight to the optimal position for enhanced target acquisition and improved shooting ergonomics. This versatile riser platform transforms any M1913 Picatinny rail into an elevated mounting surface, providing the perfect foundation for optics that require additional height clearance.
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Foundation of Excellence
Foundation of Excellence
Machined in our own state-of-the-art facility, the FORTRESS™ series EXPS-226™ represents the coalescence of over 80 years of aerospace and defense manufacturing expertise engineered into a precision-elevated riser platform. Understanding the imperatives of tactical operations, every aspect of this riser is tailored for optimal human interaction with your weapons platform across multiple optic configurations.
With extensive feedback from warfighters, law enforcement professionals, and competitive shooters, the EXPS-226™ has undergone rigorous field testing across diverse operational environments, ensuring that it doesn't just meet expectations it redefines them.
Zero Compromise Engineering
Every aspect of our manufacturing process is approached with the highest level of detail to both form and function. We believe a superior product should perform impeccably while maintaining an equally impressive aesthetic profile. In an era where production is often outsourced, our lineage of advanced in-house manufacturing shapes our steadfast commitment to precision, reliability, and unparalleled quality. The EXPS-226™ represents this philosophy in its purest form.
EXPS-226™ Optic Riser Product Compatibility
Compatible Optic Categories
The EXPS-226™ optic riser provides a universal M1913 Picatinny platform elevated to 2.26" optical centerline, compatible with:
Holographic Sights:
EOTECH® EXPS series
EOTECH® XPS series
EOTECH® 512/552/558 series
Red Dot Sights:
Any optic with Picatinny rail mount
Aimpoint® PRO/CompM4s
Trijicon® MRO
Vortex® StrikeFire series
Platform Compatibility
The EXPS-226™ riser features standard Picatinny rail attachment with our K-Clamp™ technology, ensuring compatibility with:
Any MIL-STD-1913 Picatinny rail system
AR-15/AR-10 platform upper receivers
AK platform side rail mounts (with appropriate adapters)
Bolt-action precision rifle systems
Shotgun tactical rail systems
EXPS-226™ Optic Riser Technical Specifications
Dimensions & Weight
Optical Centerline Height: 2.26" (57.4mm)
Overall Length: 4.5" (114.3mm)
Width: 1.5" (38.1mm)
Height: 1.3" (33.0mm)
Weight: 3.8 oz (107.7g) without optic
Rail Slots Required: 6 Picatinny slots
Top Rail Length: 3.5" (88.9mm) M1913 section
Materials & Finish
Construction: 7075-T651 aluminum alloy
Finish: Type III MIL SPEC hardcoat anodized
Mounting Hardware: Titanium K-Clamp™ system
Torque Specification: 25 in-lbs
Environmental Testing
Temperature Range: -40°F to +160°F (-40°C to +71°C)
Salt Spray: 96-hour exposure per ASTM B117
Vibration: MIL-STD-810 compliant
Drop Test: 12-foot concrete surface impact tested
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 EXPS-226™ elevates your optic to a 2.26" optical centerline height from the rail. The exact height will vary depending on your specific optic's design and your rail height above the bore.
What is the difference between a riser and a mount?
A riser like the EXPS-226™ provides an elevated M1913 Picatinny platform that accepts any optic with a standard rail mount. Our dedicated mounts like theMICRO-226™ are designed for specific optic footprints and provide a more streamlined, direct mounting solution.
What is the torque specification for installation?
The K-Clamp™ mounting system requires 25 in-lbs of torque. Over-torquing can damage the rail system or riser. Always use a quality torque wrench for installation.
Will this work with my EOTECH sight?
Yes, the EXPS-226™ is designed to work with all EOTECH sights that mount to M1913 Picatinny rails, including EXPS, XPS, and legacy 512/552/558 series. The riser provides the elevated platform these optics mount to.
Can I use this with a magnifier?
Absolutely. The 2.26" height is ideal for use with flip-to-side magnifiers and provides proper alignment for magnifier combinations. Ensure your magnifier is compatible with the elevated height.
Does this require any special tools for installation?
Installation requires only a T25 Torx bit (included) and a torque wrench capable of 25 in-lbs. All necessary hardware is included.
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 riser 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 riser handle full-auto fire?
Absolutely. The EXPS-226™ has been tested extensively with full-automatic select fire weapons systems and maintains zero under extreme conditions.
What's the expected lifespan of this riser?
With proper installation and normal use, the EXPS-226™ is designed for indefinite service life. That's why we back it with our lifetime warranty.
Which color should I choose?
Color choice is primarily aesthetic and operational preference:
Black
Flat Dark Earth
Desert Sand
Clear
OD Green
Can I have this riser 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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