Echelon 4.0 FC | Springfield Armory
This guide details the installation of an optic and weapon light onto the Springfield Armory Echelon pistol, as demonstrated by Roger Barrera of QVO Tactical. It covers using the Echelon's Variable Interface System (VIS) with specific pin sets for optic mounting, applying Loctite, torquing screws to spec, and adding witness marks. A Streamlight TLR-7X weapon light is also mounted, followed by a holster fitment check. The presenter exhibits a high level of expertise through methodical steps and proper tool usage.









