DLC machines next to guys doing fitting with hand tools while sitting on the floor. Suprisingly or not, it isn't really different than what I saw when I came on board as the ops manager when we attempted to resurrect Montana Rifle Company, a few weeks after they crashed and burned and the ownership group simply got in their Ubers to head to the airport to fly home. Only difference was that the guys doing the filing and hand fitting were standing at small work benches with a vise mounted on one corner, rather than sitting on the floor.
To add more context, MRC's barrel division was apparently making about 30,000 barrels a month for Remington after they purchased that division to make barrels for their AR-15s, while the barrel shop continued making barrels for MRC's bolt action rifles.
All those barrels were made on Pratt & Whitney gun drills and reamers that were surplus from the Springfield Armory - the wartime tags were all over the equipment (I should have pried a few of them off and taken them home - I would have if I had known what was going to happen to them). They dated back to WWI and had been making barrels for everything from 1903s to Vietnam era weaponry. The cutoff machine that cut down the 20' rough stock to individual pieces for drilling and reamers was made in 1903. The drilled and reamed barrels were button rifled on two different machines that were built (probably by Brian Sipe) in that shop. The "custom hand lapping" of all the finished barrels was done by muscular young guys wielding two handed cleaning rods, scrubbing a bore brush well wrapped with steel wool back and forth in them.
So... after watching how things were done at MRC, I don't see those gunmakers in Pakistan as all that much different with their tooling and fabrication.