• M1913 Picatinny Riser Platform • 2.26" Optical Centerline Height • Titanium K-Clamp™ Mounting Technology • Type III Hard Anodized 7075 Aluminum Construction • 100% Made in USA
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Overview
The Kastle XPS-226™ optic riser delivers a precise 2.26" optical centerline height, elevating your compact XPS holographic sight to the optimal position for enhanced target acquisition and superior shooting ergonomics. This streamlined riser platform transforms any M1913 Picatinny rail into an elevated mounting surface specifically optimized for performance.
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Foundation of Excellence
Foundation of Excellence
Machined in our own state-of-the-art facility, the FORTRESS™ series XPS-226™ represents the coalescence of over 80 years of aerospace and defense manufacturing expertise engineered into a precision-elevated compact riser platform. Understanding the imperatives of tactical operations, every aspect of this riser is tailored for optimal human interaction with your weapons platform .
With extensive feedback from warfighters, law enforcement professionals, and competitive shooters, the XPS-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 XPS-226™ represents this philosophy in its most refined form.
XPS-226™ Optic Riser Product Compatibility
Compatible Optic Categories
The XPS-226™ optic riser provides a compact M1913 Picatinny platform elevated to 2.26" optical centerline, specifically optimized for:
Compact Holographic Sights:
EOTECH® XPS-2/XPS-3 series
EOTECH® EXPS-2/EXPS-3 series (compact mounting)
Vortex® UH-1
Compact Red Dot Sights:
Aimpoint® PRO (compact setup)
Trijicon® MRO
Vortex® StrikeFire II
Holosun® HS503 series
Platform Compatibility
The XPS-226™ riser features standard Picatinny rail attachment with our patented KASTLE™ technology, ensuring compatibility with:
Any MIL-STD-1913 Picatinny rail system
AR-15/AR-10 platform upper receivers
Compact rifle configurations
Carbine and SBR platforms
XPS-226™ Optic Riser Technical Specifications
Dimensions & Weight
Optical Centerline Height: 2.26" (57.4mm)
Overall Length: 3.2" (81.3mm)
Width: 1.5" (38.1mm)
Height: 1.3" (33.0mm)
Weight: 2.8 oz (79.4g) without optic
Rail Slots Required: 4 Picatinny slots
Top Rail Length: 2.5" (63.5mm) M1913 section
Materials & Finish
Construction: 7075-T651 aluminum alloy
Finish: Type III hard anodized
Mounting Hardware: Patented KASTLE™ 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 XPS-226™ elevates your optic to a 2.26" optical centerline height from the rail. The exact height overbore will vary depending on your specific optic's design and your rail height above the bore.
What is the difference between the XPS-226™ and EXPS-226™?
The XPS-226 provides a 2.26” optical centerline for the Eotech XPS optic while the EXPS provides that same 2.26” optical centerline for the Eotech EXPS as these two optics come at different factory heights.
What is the torque specification for installation?
The patented KASTLE™ 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 XPS sight?
Yes, the XPS-226™ is specifically optimized for EOTECH XPS series sights and other compact optics that mount to M1913 Picatinny rails. The compact footprint complements the streamlined profile of XPS optics perfectly.
Can I use this with a magnifier?
Absolutely. The 2.26" height works excellently with flip-to-side magnifiers, and the compact platform is ideal for space-efficient 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 patented KASTLE™ technology work?
Our patented KASTLE™ system utilizes advanced clamping technology to distribute force evenly across the Picatinny rail, preventing rail deformation while ensuring return-to-zero capability.
What's the difference between Type III anodizing and standard finishes?
Type III hard 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 XPS-226™ has been tested extensively with full-automatic select fire weapons systems and maintains zero under extreme conditions despite its compact size.
What's the expected lifespan of this riser?
With proper installation and normal use, the XPS-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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