Can I swap my D-boys M4A1's gearbox set with a Systema PTW gearbox set?

Question

I was thinking my D-boys M4A1's gearbox is going to break in two years probably so I want to check if the whole Systema PTW gearbox set can fit into my D-boys M4A1?

(My M4A1 is using a Version 2 gearbox)

Answer 1

The answer is "NO" if you just look at the PTW gearbox you can see the it will not be posible to be put to your D-boys M4...

The PTW is not the same as the gearbox your M4 is using...