Product DescriptionThe Fortis Lightweight Enhanced (LE) Castle Nut & End Plate System is engineered to help prevent a receiver extension castle nut from backing out under use. Designed with Fortis innovation in mind, this lightweight setup integrates the castle nut and end plate into a robust, streamlined assembly without relying on set screws or a ratcheting mechanism. This K2 version includes a 360Adeg rotational locking quick detach (QD) socket interface and is finished in black for a clean, professional build.Product Highlights Lightweight Enhanced (LE) K2 castle nut and end plate system for AR-15 platforms Precision-machined 7075-T6 aircraft-grade aluminum castle nut and end plate Integrated QD socket with 360Adeg rotational locking interface No set screws and no ratcheting system for a simplified, low-profile installation Made in the USASpecs Brand: Fortis Manufacturing, Inc. Model/System: Lightweight Enhanced (LE) Castle Nut & End Plate System (K2) Platform: AR-15 Color/Finish: Black (anodized) Material: 7075-T6 aircraft-grade aluminum QD Socket: Yes; 360Adeg rotational locking interface Weight: 0.55 oz / 16.8 g (total) Country of Manufacture: USA UPC: 855476008261 Manufacturer Part Number: LE-BLK-K2-BLKDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.