
HK MR556 BCG with HK Markings and serials. Low round count. BOLT APPEARS TO BE A MODIFIED DI BOLT CONVERTED FOR FUNCTION WITH THE 416 PLATFORM SO FAR ACCORDING TO WHAT I'M BEING TOLD ON THE HKPRO FORUMS. PRICE HAS BEEN DROPPED ACCORDINGLY. I do not recommend using this with the included bolt!. Extra images of the bolt here: https://imgur.com/a/tNQg7ZH
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