Ridge IWB Holster for Springfield Echelon Firearms The Ridge IWB Springfield Echelon 4.5F Holster was designed to incorporate the most asked-for features for the modern concealed carry holster. It allows for optics, look-through/suppressor sights, compensators, and threaded barrels. We incorporated the top of components such as the DCC Monoblock and a snagless ModWing concealment claw for superior performance. The Ridge Springfield Echelon IWB Holster can be worn from appendix all the way to small of the back.