Springfield Armory Echelon 9mm Build Kit with Serialized FCU (COG) and 4.5" OEM Barrel
This Springfield Armory Echelon build kit is centered around the serialized Central Operating Group (FCU), designed to move between Echelon grip modules for a modular 9mm setup. It includes an OEM 4.5" hammer-forged, Melonite-finished barrel (1:10 twist) and a captive recoil assembly.
Included with this kit are multiple grip modules and the listed Echelon accessories. No slide is provided; a compatible slide assembly will need to be sourced to complete the build.



