HK SP5 Picatinny Scope Mount. The HK SP5 Picatinny Scope Mount is a factory-original accessory from Heckler & Koch, designed to provide a secure and stable platform for optics. Precision-machined from durable steel, this mount attaches directly to the SP5 receiver, offering a reliable Picatinny rail interface for scopes, red dots, or other accessories. Finished in black, it ensures both strength and a professional appearance. Type: Optic Mount / Picatinny Rail.