RECEIVER EXTENSION HK416 HK 🇩🇪April 11, 2021
Genuine Heckler & Koch receiver extension, NOS / New Old Stock, complete.
These are commercial spec receiver extensions for the HK416, they are not MR556 receiver extensions but they can be used on MR556 lowers, the standard castle nut is correct for this receiver extension.
🇩🇪 Made In Germany
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