Designed for steady, repeatable performance in varied environments, the Heckler & Koch NUT, RECEIVER EXTENSION, HK416 emphasizes functional reliability and straightforward operation. Developed with attention to component fit and workflow efficiency, the Heckler & Koch NUT, RECEIVER EXTENSION, HK416 supports smooth handling and consistent mechanical behavior.

Ideal for range training and recreational shooting, this accessory fits the Heckler & Koch MR556A1 model, ensuring compatibility and ease of use. Heckler & Koch is renowned for its commitment to quality and innovation in firearm accessories.

- Manufacturer: Heckler & Koch
- Model: MR556A1
- Product Type: Receiver Extension Nut
- Material: Steel
- Color: Black
- Unique Features: Designed for HK buffer tubes only
- What's In The Box: N/A