Overwatch Precision Aimpoint ACRO/Steiner MPS Plate for Glock MOS Pistols Black. Constructed out of A2 tool steel and finished with black nitride for lifelong protection from corrosion. Works with your existing OEM supplied screws. Mounting screws are not included. For full size Glocks will not fit slimline. Specifications for Overwatch Precision Aimpoint ACRO/Steiner MPS Plate for Glock MOS Pistols: Manufacturer: Overwatch Precision Red Dot Sights-Footprint: Aim Point Acro Optic Cut: Glock MOS Fabric/Material: Steel Color: Black Width: 0.72 in Height: 4.15 in Finish: Black Nitride Length: 2.75 in Gun Make: Glock Gun Type: Pistol Weight: 0.5 lb Condition: New Features of Overwatch Precision Aimpoint ACRO/Steiner MPS Plate for Glock MOS Pistols Compatible with 9mm .45 ACP and .40 S&W XD-S handguns as well as new Mod 2 variants. Package Contents: Overwatch Precision Aimpoint ACRO/Steiner MPS Plate for Glock MOS Pistols Overwatch Precision 20005: Aimpoint ACRO/Steiner MPS Plate for Glock MOS Pistols Black