The Fortis Lightweight K1 Castle Nut and End Plate for AR-15, Black and Flat Dark Earth is a end plate for AR-15, offered in Flat Dark Earth, Gray.
When designing their new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), Fortis has engineered a solution to install the castle nut onto the end plate that is not only robust, but also stands true to their brand of innovation and ingenuity. The K1 system features a tapered castle nut that seals itself onto the end plate. This ultra precision snug fit allows the castle nut to seat and seal itself into place without the need of staking the end plate. No ratcheting, no set screws, no backing out and no failures. All of these features at only .59 oz / 16.8 grams!
How It Compares
Also compare the Light Weight K2, Castle Nut and End Plate, Lightweight Enhanced AR15 End Plate, K1 System (Tapered) Castle Nut and K1 Enhanced End Plate Castle Nut Combo for AR-15. Browse all AR-15 Parts and the full Fortis range. New to this? Read our guide: AR-15 Upgrades: Charging Handles, Safeties, Buffers and Muzzle Devices.
Ideal For
- AR-15 builds that want a two-tone black and Flat Dark Earth end plate setup
- Builders who want the K1 tapered castle nut instead of staking the end plate
- Rifles needing a rear QD sling socket with a 360 rotational locking interface
Key Features
- Lightweight design at only .55 oz / 16.8 grams total
- Castle nut and end plate are 7075 T6 Aircraft Grade Aluminum
- Quick Detach Socket - 360 rotational locking interface
- No set screws or ratcheting system
- Made in the USA
- Castle Nut and End Plate
- Black and Flat Dark Earth
- Anodized Finish
Compatibility & Fitment
Check the platform named in the title to confirm fit before ordering. Not sure it fits? Contact us before you order and we will check for you.
Technical Specifications
Brand | Fortis |
Type | End Plate |
Model | K1 |
Finish | Anodized |
Platform | AR-15 |
Colors | Flat Dark Earth, Gray |
MPN | LE-BLK-K1-FDE, LE-BLK-K1-GRY |
UPC | 810103343269, 850015927188 |
US Shipping & Support
Genuine Fortis, brand new and covered by the manufacturer's warranty. Shipping is free on US orders of $99 or more, and smaller orders ship from $6.95. Questions about fit, mounting or which option suits your setup? Our team is glad to help before and after your purchase.
Frequently Asked Questions
What colors is it available in?
Flat Dark Earth, Gray. Choose your color from the options above.
Is this a genuine Fortis product?
Yes. It is a new, genuine Fortis product sourced through an authorized US distributor.
How much is shipping?
Shipping is free on US orders of $99 or more. Orders under $99 ship at a flat rate from $6.95 to $9.95, depending on the order total.
