Some of that is pretty dated. The shooting instructor shown is Ken Davies and he’s been retired for 7 or 8 years now.
The part where they show them striking the barrels in the furnace, that’s a guy who seriously knows his stuff. When you solder barrels that way there is zero room for mistakes, takes a cocky SOB to know he’s that good…and they’re that good. I’ve watched people strike barrels with a torch several times, even re-laid a rib myself once. But I’ve never seen anyone wire it all up and just chuck it in a furnace; that’s skill. You see the torch method later.
Facing the barrels to the breech, that’s very time consuming. When done you shouldn’t be able to close the breach on a piece of paper.
Then notice the subtle angels of the triggers and how they have to be filed to put them in precisely the right spot for the shooter.
I believe that is Michael heading up the stock, went shooting with him one day. He’s plum tired of shooting Hollands and was delighted to shoot my Russian AK, and had me take video so he could show his friends. Heading up a stock is THE critical point. You have to account for drop and cast at that point so the grain is never interrupted when it all comes out.
Barrel regulation, that’s black magic witchcraft stuff right there.
Very good video, now you know why they cost as much as a small house.