C&H Precision V4 Optic Mounting Plate For Echelon to Holosun 407K/507K and C&H EDC Anodized Finish Black. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping. Specifications for C&H Precision Weapons V4 Optic Mounting Plate For: Manufacturer: C&H Precision Weapons Additional Features: Mount Included Accessories: Mounting Screws Optic Cut: Springfield OSP Color: Black Gun Model: Springfield Armory Echelon Case Finish: Anodized Handle Color: Black Blade Finish: Anodized Handle Finish: Anodized Finish: Anodized Black Gun Make: Springfield Armory Condition: New Features of C&H Precision Weapons V4 Optic Mounting Plate For: For Converting Springfield Echelon to Aimpoint Acro/ C&H Duty Package Contents: C&H Precision Weapons V4 Optic Mounting Plate For What firearm models does the manufacturer say C&H Precision Weapons V4 Optic Mounting Plate For is compatible with? The manufacturer suggests that C&H Precision Weapons V4 Optic Mounting Plate For is compatible with Springfield Armory Echelon