The upper part of the Lee Enfield should normally be painted brown (since its wood).
But maybe you already know and you paint them this way because you find that it look better. I do not remember the details but I know that I’ve painted elements on figures that were completely inaccurate from a historical point of view just because I thought it look better.
Anyway, you did a great work on these figures... much better than I could have done myself
Cheers!