• M1913 Picatinny Riser
• Lower 1/3 Co-Witness Optics
• 2.26” Optical Centerline
• Titanium KastleClamp™ Mounting Tech
• 7075-T651 Aluminum 
• Type III MIL SPEC Hardcoat Anodized
• 100% Made in The U.S.A.

Overview
The Kastle FRT-EXPS™ lower ⅓ co-witness optic riser offers a 2.26″ optical centerline height, which promotes a heads-up posture for faster target acquisition. It is designed for use with the EOTECH™ EXPS series and similar optics.  The FRT-EXPS™ features our patented titanium KastleClamp™ mounting technology. Proudly made in America from 7075-T651 aluminum and type III MIL SPEC hardcoat anodized in 4 available finishes.

Tough Framework
Machined in our own state of the art facility the FORTRESS™ series optic mounts boast the most rigid and durable designs on the market. These mounts were developed and created by shooters for shooters. We stand behind our product so strongly it is backed by our lifetime manufacturer warranty.

Open-Source Mounting
The Kastle™ Mount utilizes industry-standard Picatinny rail compatibility, allowing installation on almost all modern weapons systems.

Lifetime Warranty
Each KASTLE® FORTRESS™ series optic riser is covered by a Manufacturer’s Lifetime Warranty.