Heckler and Koch VP9 Optics Ready Mounting Plate #3, C-More STS2. Manufactured from steel, this optics ready mounting plate #3 is for the Heckler and Koch VP9 9mm pistol platform. This mounting plate allows you to attach the Vortex C-More STS2 optics system to your pistol. Perfect for getting your pistol's optic system secure and ready, this piece works great for the next workshop project, as an immediate replacement or spare.