since this in the AR forum im assuming thats what the question is limited to. my pref is the A1 format with carry handle see thru mount. i got troy industry flip up sights for my flattop 458 socom as backup. i dont normally put em on the upper but i got em and they hold zero when removed and re-mounted.
the reason i prefer the A1 non removable carrying handle and A1 fixed fsb is no matter how rough i get they wont lose zero since you cant accidentally hit the adjustment wheel and move the sights.
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