I have some problems with the screen space reflection, first of all this the 1p mesh weapon reflect in the ground or wall and looks a floating hands with weapon without the 3p mesh body.
-Add or change the screen space reflections to select like with shadows the affected meshes, but size this get the screen image no idea is this is possible, but is possible with recording camera select the visible models by the camera?
Other problem is with the 1p mesh shadows, you can select to cast shadows only the that model but i like drop shadows to the hands model and the weapon model like in the CS:GO and no idea how.
-Add something to group for the self shadow cast shadow. (for group the hands and the weapon for example)