The story as I remember it was a cross between CMsix's Helga and Matt Helms Trip to Waco Pt II. A family moving west by wagon. The father was either not with the family, leaves, or is killed off early. Teen son becomes main man. Obligatory bad guys cutting down trees to hold up. One or more wagons join before or after man from future with modern arms is sent back and joins them. Later, more modern arms are provided for rest of family. It was a good bit longer than CMsix's of this type. Read it at least 5 or more years ago. I thought it was by CMsix but can't seem to find it on his pages.