New HK Factory German MR556 Upper Kit with M-LOK forearm
Includes:
- Complete MR556 upper receiver with M-LOK forearm
- MR556 Bolt group Complete
- Tungsten Filled HK Buffer
- HK Buffer Spring
- One 30 Round HK Steel Maritime Magazine
No FFL required as the upper assembly is only considered a part and not an FFL item.
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