While I agree for the most part I will play devil's advocate as well.
Aftermarket furniture offers advantages:
Rubber recoil pads for non slip
The A2 finger tab is placed wrong, rubber grips offer better control
Keymod is lighter than 1913 but is inferior to Mlok.
Cheap optics SUCK A$$!! Eotech is in that category for lack of quality
FSB's are amazingly simple, rugged and functional
MM
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