The RX-78NT-X (MRX-003) NT-X (pronounced Netix) is a Mobile Suit which was featured in the video game SD Gundam G Generation Series.
From the Modeler:
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Comparison with bare assembly
It was difficult because it’s not a MS for which there is much documentation.
Also reproduced when the wired beam cannon is deployed.
The gun barrel slide when firing the beam cannon is also reproduced.