Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout NI-B-556. The bright satin finish serves as a functional surface that provides smooth reliable operation while offering excellent wear resistance and notably...
Walker Defense Research Nickel Boron Bolt Carrier Group 5.56x45mm NATO/.300 AAC Blackout NI-B-556. The bright satin finish serves as a functional surface that provides smooth reliable operation while offering excellent wear resistance and notably...