Heckler & Koch MR556 Proofed Complete Bolt Carrier Group
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.
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This product has multiple variants. The options may be chosen on the product page
Select optionsThis product has multiple variants. The options may be chosen on the product page
This product has multiple variants. The options may be chosen on the product page
