C&H Precision Weapons AOS Cut to Holosun 407k / 507k no Integrated Rear Sight Black. This plate is used with the Springfield Armory Prodigy.SPECIFICATION: Material: Aluminum. All mounting hardware is Stainless Steel Finish: Plates are MIL-SPEC Type III Hard Anodized Black INCLUDED: Qty 1 Optic Plate Qty 3 6-48 x .200 FH Plate Mounting Screws Qty 3 4-40 x .345 FHB Holosun 407k / 507k CHPWS EDC / EDC Enclosed Optic Mounting Screws Qty 3 Stainless Steel T-Nuts Specifications for C&H Precision Weapons AOS Cut to Holosun 407k / 507k: Manufacturer: C&H Precision Weapons Red Dot Sights-Footprint: Holosun K Included Accessories: Mounting Screws Optic Cut: Agency Optics System (AOS) Color: Black Finish: Anodized Package Contents: C&H Precision Weapons AOS Cut to Holosun 407k / 507k C&H Precision Weapons AOS-HOLOk-NRS: AOS Cut to Holosun 407k / 507k no Integrated Rear Sight Black