i know this has been covered before but i cant find it anywhere. i dont know if maybe im just typing the wrong thing into google and/or the search bar. so i apologize in advance....i know
feel free to explain it here or post the link....i do not have a problem reading and searching to learn.
I am new to the AR world and have yet to own one, just messed with a few and love the way they shoot.
I have seen "modular" ars that can swap from cal to cal with just swapping out the upper.....but cant most ars do that as well? what makes it fall into the modular category instead of just a regular ar?
thank you and sorry
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