HAUS semi-auto fire control axle for HK MR556 and MR762 rifles.
These axles have been carburized and case hardened for strength an durability and they have a crisp snap when they lock into position.
- Material – Steel
- Surface hardness – 60-61 HRC
- Finish – Black Oxide
- Compatibility – HK MR556, HK416, HK417
🇺🇸 Made in the USA