Hello Carlos, I believe by looking at the pictures that Steve posted of the bolo that the hilt is one solid piece. The revolver you show has slab grips, two separate pieces with the frame in between. I don't think I have ever seen a hand gun or with a solid hilt like this one before but there are millions of things I haven't seen yet.
I'm hoping that when this arrives you will find the hilt is made of buffalo horn.
Again my congratulation.
Robert