The HK Red Dot Mounting Plate, 509T (brand part no. 51000792) mounts a Holosun 509T red dot to Heckler & Koch VP-series and other HK optics-ready pistol slides. At 5.9 inches, the plate is sized to match the 509T’s larger footprint, giving the optic a stable, direct mounting surface rather than relying on an oversized adapter that can introduce play or affect return to zero. For HK owners who have committed to the 509T specifically, this plate is the direct-fit route rather than a universal adapter built to cover multiple footprints at once.

Key Specifications

• 5.9-inch mounting plate matches the Holosun 509T’s larger optic footprint for a stable mounting surface.
• Fits HK VP and optics-ready slides designed specifically for Heckler & Koch pistols cut for the 509T pattern.
• Direct-fit design gives the 509T a dedicated mounting plate instead of relying on a multi-footprint universal adapter.
• Built for the 509T footprint specifically avoids the extra play a universal adapter can introduce with an oversized optic.

Frequently Asked Questions

What optic does this plate fit? It is sized specifically for the Holosun 509T footprint.

What pistols does this plate work with? Heckler & Koch VP-series and other HK slides cut for the 509T optics-ready pattern.

Buy the HK Red Dot Mounting Plate, 509T

Order the HK Red Dot Mounting Plate, 509T from Heckler & Koch to mount your 509T with a direct, stable fit. Pick it up from our Lubbock, Texas gun shop. Browse our red dot mounts lineup for more.