Fortis Lightweight Enhanced K1 Castle Nut & End Plate System – FDE
The Fortis K1 Castle Nut & End Plate System in FDE features a lightweight self-locking design that eliminates the need for staking while providing a secure buffer tube attachment and integrated QD sling mounting point for AR-15 platforms.
Upgrade your AR-15 with the Fortis Lightweight Enhanced K1 Castle Nut & End Plate System in Flat Dark Earth. Engineered for shooters who demand both performance and innovation, the K1 system utilizes a unique tapered castle nut that wedges securely into the matching end plate, creating an ultra-precise lockup that virtually eliminates the possibility of the castle nut backing out during use. Unlike traditional systems, the Fortis K1 requires no staking, set screws, or ratcheting mechanisms.
Machined from lightweight 7075-T6 aircraft-grade aluminum, the K1 system weighs less than one ounce while maintaining exceptional strength and durability. The integrated 360-degree QD sling socket allows for ambidextrous sling attachment and enhanced weapon handling, making it an excellent choice for duty rifles, defensive carbines, competition builds, and custom AR platforms.
Finished in Flat Dark Earth anodizing, the Fortis K1 not only improves the function of your rifle but also adds a clean, premium appearance that complements modern AR-15 builds. Proudly made in the USA, the K1 Castle Nut & End Plate System is a lightweight solution designed to simplify installation while delivering long-term reliability.
Key Features
- Innovative K1 tapered self-locking castle nut design
- Eliminates the need for staking
- Lightweight 7075-T6 aircraft-grade aluminum construction
- Integrated 360° QD sling attachment socket
- No set screws or ratcheting mechanisms
- Flat Dark Earth anodized finish
- Compatible with AR-15 and AR-10 platforms
- Made in the USA
- Total weight approximately 0.59 oz (16.8 grams)
| Color | Black, Flat Dark Earth |