New handrail for G&G TR4-18

[Wolfscout1]

I was wondering if you could help me.I currently own a g and g armament TR4-18 EBB AEG long. And I am wanting to replace the rail for a big dragon G-style 14.5 or 10.5. My concern is that they are designed for national and umarex 416s so I was wondering if it would fit my rifle. Because I know they are designed off the same gun but I don’t know if the way the rail connects is different.

Any help or advise would be much appreciated.