Originally Posted by LAA

Either tight tolerances for accuracy, or loose, to fill with sand and still work. I prefer the accuracy, good looking rails, and that kind of stuff. My ARs most likely won't go into battle anytime soon. They're too expensive to throw at concrete pads. In the meantime, I'll just take them on my weekly runs to the desert, to maintain target proficiency. That's why I own them.

Note: I've assembled three ARs from many different part producers. They're more on the high end, cost wise. However, they all work, all the time. Not a failure yet (see note below). If worse comes to worse, I'll just try not to do drop tests on concrete, prior to use.

Note below: I didn't expect certain 300 Blackout sub-sonic loads to fully cycle the rifle, without a suppressor. They didn't.