Springfield Armory Echelon Optic Mounting Screw Kit For Vis Black. This optic mounting screw kit provides users a variety of Echelon-specific screws to assist in mounting popular red dot optics to the Variable Interface System. This means no messing with cutting down your own screws to the proper length. Blue Loctite is pre-applied for additional strength. Specifications for Springfield Armory Echelon Optic Mounting Screw Kit For Vis: Manufacturer: Springfield Armory Color: Black Finish: Black Fabric/Material: Steel Gun Make: Springfield Armory Gun Type: Pistol Fit: Springfield Echelon Compact Springfield Echelon Full-Size Red Dot Sights-Footprint: RMR Package Contents: Springfield Armory Echelon Optic Mounting Screw Kit For Vis Springfield Armory EC5077S-KIT: Echelon Optic Mounting Screw Kit For Vis Black