Fortis Manufacturing

Overview

The Fortis Light Weight K1 Castle Nut and End Plate in Flat Dark Earth is an enhanced type designed for secure attachment of the buffer tube to the lower receiver. This component features a lightweight construction that minimizes additional weight on your build without sacrificing durability, making it ideal for streamlined setups. It commonly appears in mid-length gas system builds chambered in 5.56 NATO, where performance and weight savings are key priorities.