HK VP9 Optics Adapter Plate Holosun 407K 507K EPS Fits the HK VP9 w Optic Cuts Black 51000381 UPC 642230269774
Product Description
The Heckler & Koch OEM Optics Adapter Plate for Holosun K-Series (MPN: 51000381) is a precision-engineered factory mounting solution designed to bridge HK VP9 Optics Ready (OR) pistol slides with compact micro red dot sights (MRDS). Engineered specifically to adapt the VP9 factory slide cut to the popular Holosun K-footprint (modified RMSc pattern), this plate provides a low-profile, rock-solid mounting surface for Holosun 407K, 507K, EPS, and EPS Carry red dot optics.
Precision CNC-machined from high-strength steel alloy and finished in a matching factory-grade matte black coating, the HK 51000381 adapter plate is built to endure extreme recoil forces, slide acceleration, and environmental wear. The ultra-slim plate profile keeps the optic axis seated as low as possible on the slide deck, facilitating a clean, natural sight picture and allowing potential lower-third co-witnessing with suppressor-height iron sights.
Factory-engineered to exact German defense tolerances, this OEM adapter plate ensures absolute thread engagement and recoil lug index positioning, preventing zero shift or optic movement under heavy firing schedules. Backed by Heckler & Koch's uncompromising manufacturing standards, it is an essential factory upgrade for outfitting your HK VP9, VP9SK, or VP9L Optics Ready pistol for concealed carry or duty duty staging.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits all factory Heckler & Koch VP9 Optics Ready (OR) full-size, VP9SK OR, VP9L OR, and VP9 Tactical OR pistol models. Precision-cut for optics matching the Holosun K-series footprint (Holosun 407K, 507K, EPS, EPS Carry). (Note: Not compatible with legacy non-optics-ready VP9 slides without custom aftermarket machining, nor full-size RMR or Doctor footprint optics).
- Perform a complete firearm safety check: drop the magazine, lock the slide rearward, and visually/physically inspect the chamber to verify zero live rounds are present.
- Remove the factory optic cover plate from the top of the VP9 slide using the appropriate Torx key.
- Thoroughly clean and degrease the exposed slide optic pocket and female screw threads using isopropyl alcohol to ensure zero residual factory oil remains.
- Place the HK 51000381 adapter plate flat into the slide recess, ensuring recoil indexing nubs align flush against the slide cut.
- Secure the plate to the slide using the included HK plate mounting screws, applying a small drop of medium-strength blue thread locker and torquing to HK factory specification (12–15 in-lbs).
- Mount your Holosun 407K, 507K, or EPS red dot onto the plate studs, apply thread locker to the optic screws, and torque to 12–15 in-lbs before range deployment.
Key Features
- Genuine Heckler & Koch OEM Component: Guarantees 100% factory precision fitment, zero-shift alignment, and slide cut integration.
- Holosun K-Footprint Interface: Directly adapts factory HK VP9 OR slides to fit Holosun 407K, 507K, EPS, and EPS Carry micro optics.
- Precision Machined Steel Construction: Crafted from high-density alloy steel to withstand continuous slide reciprocating inertia and thermal stress.
- Ultra-Low Profile Deck Height: Maintains a streamlined, low optic axis for rapid red dot acquisition and iron sight co-witness compatibility.
- Matte Black Protective Finish: Factory-matched corrosion and wear-resistant coating seamlessly blends with the VP9 slide finish.
- Includes Factory Hardware: Comes packaged with original mounting screws for immediate bench-to-range staging.
Product Specifications
- Brand: Heckler & Koch (HK)
- Model/Series: VP9 Optics Ready Adapter Plate (Holosun K / EPS)
- MPN / SKU: 51000381
- UPC: 642230269774
- Optic Footprint Compatibility: Holosun 407K / 507K / EPS / EPS Carry
- Platform Compatibility: HK VP9 OR / VP9SK OR / VP9L OR / VP9 Tactical OR
- Material: CNC-Machined High-Strength Steel
- Finish / Color: Factory Matte Black
- Weight: 0.8 oz
- Country of Origin: Germany / USA
