/diy/ - Do It Yourself

>>2721756
It's so you can bleach the fuck out of it when it inevitably gets covered in dirt, shit, etc. It's pretty obvious.

>>2701174
Nice cherry picking, you forgot the section right after that.
>Charles Fitch credited Whitney with successfully executing a firearms contract with interchangeable parts using the American System,[4] but historians Merritt Roe Smith and Robert B. Gordon have since determined that Whitney never actually achieved interchangeable parts manufacturing. His family's arms company, however, did so after his death.
>Whitney never actually achieved interchangeable parts manufacturing.
Regardless of that, "modern" like machine tools date to the 15th century. If you don't want to count what was basically a lathe that only does threading, the industrial revolution had been going on for 50 years by the time Whitney did this stunt, and machine tools were in widespread use. I mean for fucks sake anon, we had rifled barrels decades before this. Did you think they were hand filing the rifling? Learn some fucking history, holy shit.