All true as far as function, but you may want to look closely...I don't worry too much about tight or wiggle between upper and lower, but I have noticed with certain charging handle/upper/lower combinations, there is extra wear-rubbing between the bottom rear of the CH and the lower receiver...where you pull the CH back.
"Men speak of natural rights, but I challenge any one to show where in nature any rights existed or were recognized until there was established for their declaration and protection a duly promulgated body of corresponding laws." --Calvin Coolidge
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