Beretta APX parts swap

Hey guys, in not expecting to get a solid answer on this one, kind of obscure, but I figured I would try.
So, I want to get the Beretta APX CO2 bb pistol.
They only have this gun available in solid black,
They have an airsoft version (6mm) that has a grey colored slide and grey colored hand grips.
I like the color scheme and want a regular 4.5 mm bb pistol, with the grey parts, but they don't sell it. Sooooo, does anyone know if the slide is Interchangeable? I know the hand grips are , but the slide I'm not sure of. It appears to be the same size , but I'm thinking maybe the barrel is smaller ? I put pics up so y'all could see, basically I want to buy a used 6mm grey version and swap the slide and the hand grips to the 4.5mm bb one. Anyone tried this? Like I said I know that's super specific, and I'll prolly just have to buy them and find out myself.

Screenshot_20221021-162319.png


Screenshot_20221021-162339.png