Wells MRT upper and mag terminals

Does anyone know if a Wells upper receiver would fit a MRT lower receiver?
And can J9 mags be used in the MRT if the terminals were to be moved on the gearbox?
Thanks in advance!

Yes the the combination of upper/ lower will work no worries. No J9 mags won’t work without modding t pieces and the fit will be pretty sloppy due to the magwell being suited to fit the slightly thinner wells.