Errors and Mistakes

[Keirron]

Machina Pistol: The autotek pistol is a high-quality weapon used as a concealed backup weapon by police
officers or for personal defense. The autotek pistol is typical of a number of short-barreled (3 inches) smallcaliber
pistols

This paragraph in the firearms pdf is quite confusing, first off, it only speaks of autotek pistols, which I assume is a typo, and what does it mean "a 'typical' number of ... pistols" is it multiple barrels?

Edit: Excuse me, I have dyslexia and I read the words in the wrong order, it says "Typical of a number of..." not "a typical number of..." Sorry for the confusion