The internet has a lot of data, but the manuals have a ton of data that isn't online. Is this extra data needed? Not necessarily, especially since you could post a question online and people with the manuals will often give you what you need.
"You'll shoot your eye out." -Mom
"I want a laser for my gun." -my wife
G30, G20/21L, G34, G29, G27, G33, G23
Springfield Loaded (Black SS)
Sig P220 Stainless Elite