WMD Guns Accent Build Kit 5.56 Nitromet Black. 56 Accent Build Kit has everything you need to build your own AR. With the WMD Accent Build Kit getting an AR put together is a breeze. And with the extras included in this kit building your own from the ground up is a breeze. The WMD Guns Build Kit comes complete with the inner workings of an AR and it's all assembled and ready to go. No matter what AR build you want to do the WMD Guns Full Build Kit has all the parts you need. Specifications for WMD Guns 5.56 Accent Build Kit: Manufacturer: WMD Guns Caliber: 5.56x45mm NATO Gun Make: AR Platform Package Contents: WMD Guns 5.56 Accent Build Kit WMD Guns 1-ACCKIT-NM: Accent Build Kit 5.56 Nitromet Black