I watch them both because they are fun and interesting and involve guns in a generally favorable light. But, they are TV entertainment and I keep that in mind.
But I do recall an episode of American Guns (Gunsmoke?) where they actually built from raw stock a replica Colt SSA for a preacher that was a SAS member.
I saw that episode. You weren't watching carefully. At one point they were delayed because they had to order parts. Not a "from scratch" build at all. Plus the price they charged was out of the world ridikolous. They could have tuned and customized a dozen Colts for that price.
But, the girls are cute.