I am not familiar with the rifle you copied, that said, your lock panels and carvings are very heavy handed. I was very heavy handed on my first rifle's moldings and lock panels, I didn't carve the rifle and haven't carved any of my later ones either because I haven't put in the work and practice to do it right, my tool sharpening ability is subpar as well.
I don't think your tools were as sharp as they needed to be to execute your carvings correctly.
There is a scroll template kit that was mentioned in another carving post that is up right now, it looks like just what I need to balance my carving designs. Free hand drawing scrolls that are even, not doglegged and well balanced is my main carving weak point and I used to be a passable artist when I was younger, much younger.