The HK mounting plate #4 is the factory answer for putting a Leupold DeltaPoint Pro on a VP9 OR pistol without an adapter stack (brand part no. 50254264). Heckler & Koch ships its optics-ready VP series with a blank filler plate covering the slide cut, and this steel plate replaces it to expose a correctly indexed DeltaPoint Pro footprint. Because it installs with the same OEM screws that held the filler plate, nothing extra has to be sourced to finish the job. The numbered plate system matters here, since HK uses a different plate for each optic footprint and #4 is the DeltaPoint Pro pattern specifically. For a duty or range VP9 headed toward a red dot, this is the direct, no-guesswork path.

Key Specifications

• The optic pattern is the Leupold DeltaPoint Pro footprint, which is what makes this plate #4 rather than one of the other numbered plates in the HK system.
• It fits VP9 OR and VP series optics-ready slides, the models that leave the factory with a milled optic cut under a filler plate.
• Construction is steel, chosen over aluminum because the plate carries the optic’s recoil loading on a pistol slide.
• The finish is black, matching the factory slide so the installed plate does not stand out.
• Installation reuses the OEM filler plate screws, so no separate hardware purchase is required to complete the swap.
• It also accepts the Vortex Defender-ST and Defender-XL, both of which share the DeltaPoint Pro footprint.
• It is not compatible with the Vortex Defender-CCW, which uses a different and smaller mounting pattern.
• It is likewise not compatible with Shield, JPoint, or RMSc footprint optics, a distinction worth confirming before ordering a sight.
• The plate mounts the optic directly to the slide cut, keeping the sight as low as the platform allows rather than stacking height with an adapter.

Frequently Asked Questions

Which pistols does this plate fit? It is made for the HK VP9 OR and the optics-ready VP series, meaning slides that came from the factory with the optic cut and a blank filler plate installed over it.

Which red dots will mount on it? Anything using the Leupold DeltaPoint Pro footprint, including the DeltaPoint Pro itself and the Vortex Defender-ST and Defender-XL. Shield, JPoint, RMSc, and Defender-CCW pattern optics will not fit.

Do I need to buy screws separately? No. The plate installs using the same OEM screws that secure the factory filler plate on the VP9, so the parts you already have will finish the installation.

Buy the HK Mounting Plate #4 for VP9 OR, Leupold DeltaPoint Pro

Getting a red dot onto an optics-ready pistol goes wrong most often at the plate, where the wrong footprint means a sight that will not sit flat or will not sit at all. Buying the factory plate matched to your optic removes that variable entirely and keeps the mounting height where HK intended. Order it with our other red dot mounts from our Lubbock, Texas shop for fast direct shipping.