Comments by "" (@neutronalchemist3241) on "Rogak P18 - A Cautionary Tale of Manufacturing" video.

  1. There is another reason. To detect hairline cracks and casting defects. They are much more visible on the mirror-like Surface than on the rough cast Surface.
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  2. There is a lot of people that buy guns without having handled it in person, and back in the '80s there weren't online reviews. Access to information on product quality was a bit more difficult.
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  3. Design costs. If you use a system used by one hundred other manufacturers, you doesn't really have to design anything new. All the weights, forms and tolerances are in the books, or you can more or less copy it from an existing design, and you concentrate on aestetics and/or secondary features. If you use a new system, you have to really design every bit of it starting from a White sheet. The dimension of the gas ports, their position in the barrel, the dimension of the gas chamber, all relative to the weigh tof the slide... Add that delayed blowback systems are slide-weight sensitive. Usually they comes in only one form (there is not a Compact HK P7, a compact Steyr GB or a compact Benelli B76) cause to design a different dimension of the same pistol, is like designing a new pistol.
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