Heckler & Koch MR556 Proofed Complete Bolt Carrier Group
Heckler & Koch MR556 Proofed Complete Bolt Carrier Group - Image 2

Heckler & Koch MR556 Proofed Complete Bolt Carrier Group

$542.00

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HK Part Number 51000978

(1 customer review)

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Heckler & Koch MR556 Proofed Complete Bolt Carrier Group

A genuine German and OEM replacement bolt carrier group for use in your MR556.

Compatible with MR556 rifles. Semi-auto, not compatible for use in machineguns.

Click here to browse our entire selection of Bolt Carrier Groups & Parts.

1 review for Heckler & Koch MR556 Proofed Complete Bolt Carrier Group

  1. Jacob A. (verified owner) –

    Ran this the day I received it. Flawless. My original is fine, but two is one, and one is none. And the price for this unit is the best on the internet, period.

    Also, thanks for sending lunch.

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