The Heckler & Koch NUT Receiver Extension (part #50233165, UPC 642230249349) is the premier accessory for owners of the HK416 platform seeking enhanced reliability and a smoother shooting experience. Engineered by the world‑renowned firearms manufacturer Heckler & Koch, this receiver extension delivers the precision and durability that professionals demand.
Key Benefits
- Improved Feeding Reliability: The extended receiver creates a more stable feeding geometry, reducing malfunctions during rapid fire.
- Enhanced Barrel Support: Provides additional structural support to the barrel, extending component life and maintaining zero.
- OEM‑Grade Materials: Constructed from high‑strength aerospace aluminum alloy, heat‑treated for maximum strength-to-weight ratio.
- Seamless Integration: Direct bolt‑on fit for the HK416 without the need for additional modifications or adapters.
- Corrosion‑Resistant Finish: Anodized coating protects against harsh environments, making it ideal for tactical, law‑enforcement, and outdoor use.
Technical Specifications
| Manufacturer | Heckler & Koch |
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| Model | NUT Receiver Extension |
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| Compatible Platform | HK416 (all variants) |
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| Part Number | 50233165 |
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| UPC | 642230249349 |
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| Material | Aerospace‑grade aluminum alloy (7075‑T6) |
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| Finish | Hard‑coat anodized (black) |
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| Length Extension | ≈ 0.31 in (7.9 mm) |
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| Weight | ≈ 0.12 lb (55 g) |
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| Installation | Tool‑free bolt‑on; fits standard HK416 receivers |
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Why Choose the Heckler & Koch NUT Receiver Extension?
When you invest in the Heckler & Koch NUT Receiver Extension, you’re adding a component that is not only built to HK standards but also tested under the same rigorous conditions as the original rifle. This extension:
- Boosts overall weapon reliability for both professional and civilian shooters.
- Maintains the iconic ergonomics and balance of the HK416.
- Offers a cost‑effective method to upgrade your rifle without compromising performance.
- Comes with a full manufacturer warranty, ensuring peace of mind.
Installation Overview
Installation of the NUT Receiver Extension is straightforward:
- Ensure the rifle is unloaded and safe.
- Remove the existing receiver cover.
- Align the extension’s mounting tabs with the receiver slots.
- Press the extension firmly until it seats securely.
- Re‑install the receiver cover and perform a function check.
All necessary tools are standard to any HK416 maintenance kit, and the process can be completed in under ten minutes.
Compatibility & Applications
This receiver extension is fully compatible with:
- Standard HK416 rifles
- HK416 A5 and A5.2 variants
- Custom HK416 builds featuring original receivers
Ideal for tactical operations, competitive shooting, and personal defense, the extension enhances performance across all scenarios.
Customer Support & Warranty
Heckler & Koch stands behind every component with a limited lifetime warranty against manufacturing defects. Our dedicated support team is ready to assist with installation tips, technical questions, and warranty claims.
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