mounting pads no4T sniper?

[tbonesmith]

Geneally the part is located by the jig and drill bushings are used.

Micheal Petrov found the video linked below showing drilling on a receiver. Ludicrously fast, but think how many rifles were being produced a day! Tooling is as important the design of the weapon. If you can't produce it efficiently, and repeatably, then you are doomed.

Thread: "Not 1903's but interesting." by Michael Petrov

"Workers work on machinery to manufacture ordnance material in a factory in the United States."

Thanks for posting, awesome look at some fascinating processes!