The Barrett MRADELR .416 Barrett “EA” Barrel Maker Kit is a component set designed for qualified builders creating a custom barrel assembly for the MRADELR platform. The kit includes the core parts needed for proper barrel integration - such as the barrel extension, extension jam nut, bolt, extractor, ejector components, and an instruction card - while intentionally omitting the firing pin assembly. Compatible with the .416 Barrett cartridge family, the Maker Kit provides the foundation required for precision barrel manufacturing while allowing gunsmiths to determine the final barrel specifications according to their build requirements and performance objectives.